Class v1.SubscriberClient (4.0.0)

The service that an application uses to manipulate subscriptions and to consume messages from a subscription via the Pull method or by establishing a bi-directional stream using the StreamingPull method. v1

Package

@google-cloud/pubsub

Constructors

(constructor)(opts, gaxInstance)

constructor(opts?: ClientOptions, gaxInstance?: typeof gax | typeof gax.fallback);

Construct an instance of SubscriberClient.

Parameters
Name	Description
`opts`	`ClientOptions`
`gaxInstance`	`typeof gax \| typeof fallback` : loaded instance of `google-gax`. Useful if you need to avoid loading the default gRPC version and want to use the fallback HTTP implementation. Load only fallback version and pass it to the constructor: ``` const gax = require('google-gax/build/src/fallback'); // avoids loading google-gax with gRPC const client = new SubscriberClient({fallback: 'rest'}, gax); ```

Properties

apiEndpoint

static get apiEndpoint(): string;

The DNS address for this API service - same as servicePath(), exists for compatibility reasons.

auth

auth: gax.GoogleAuth;

descriptors

descriptors: Descriptors;

iamClient

iamClient: IamClient;

innerApiCalls

innerApiCalls: {
        [name: string]: Function;
    };

pathTemplates

pathTemplates: {
        [name: string]: gax.PathTemplate;
    };

port

static get port(): number;

The port for this API service.

scopes

static get scopes(): string[];

The scopes needed to make gRPC calls for every method defined in this service.

servicePath

static get servicePath(): string;

The DNS address for this API service.

subscriberStub

subscriberStub?: Promise<{
        [name: string]: Function;
    }>;

warn

warn: (code: string, message: string, warnType?: string) => void;

Methods

acknowledge(request, options)

acknowledge(request?: protos.google.pubsub.v1.IAcknowledgeRequest, options?: CallOptions): Promise<[
        protos.google.protobuf.IEmpty,
        protos.google.pubsub.v1.IAcknowledgeRequest | undefined,
        {} | undefined
    ]>;

Acknowledges the messages associated with the ack_ids in the AcknowledgeRequest. The Pub/Sub system can remove the relevant messages from the subscription.

Acknowledging a message whose ack deadline has expired may succeed, but such a message may be redelivered later. Acknowledging a message more than once will not result in an error.

Parameters
Name	Description
`request`	`IAcknowledgeRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IAcknowledgeRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Empty. Please see the documentation for more details and examples.

acknowledge(request, options, callback)

acknowledge(request: protos.google.pubsub.v1.IAcknowledgeRequest, options: CallOptions, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IAcknowledgeRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IAcknowledgeRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IAcknowledgeRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

acknowledge(request, callback)

acknowledge(request: protos.google.pubsub.v1.IAcknowledgeRequest, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IAcknowledgeRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IAcknowledgeRequest`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IAcknowledgeRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

close()

close(): Promise<void>;

Terminate the gRPC channel and close the client.

The client will no longer be usable and all future behavior is undefined.

Returns
Type	Description
`Promise<void>`	{Promise} A promise that resolves when the client is closed.

createSnapshot(request, options)

createSnapshot(request?: protos.google.pubsub.v1.ICreateSnapshotRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISnapshot,
        protos.google.pubsub.v1.ICreateSnapshotRequest | undefined,
        {} | undefined
    ]>;

Creates a snapshot from the requested subscription. Snapshots are used in [Seek](https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. If the snapshot already exists, returns ALREADY_EXISTS. If the requested subscription doesn't exist, returns NOT_FOUND. If the backlog in the subscription is too old -- and the resulting snapshot would expire in less than 1 hour -- then FAILED_PRECONDITION is returned. See also the Snapshot.expire_time field. If the name is not provided in the request, the server will assign a random name for this snapshot on the same project as the subscription, conforming to the [resource name format] (https://cloud.google.com/pubsub/docs/admin#resource_names). The generated name is populated in the returned Snapshot object. Note that for REST API requests, you must specify a name in the request.

Parameters
Name	Description
`request`	`ICreateSnapshotRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.ICreateSnapshotRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Snapshot. Please see the documentation for more details and examples.

createSnapshot(request, options, callback)

createSnapshot(request: protos.google.pubsub.v1.ICreateSnapshotRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.ICreateSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`ICreateSnapshotRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.ICreateSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

createSnapshot(request, callback)

createSnapshot(request: protos.google.pubsub.v1.ICreateSnapshotRequest, callback: Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.ICreateSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`ICreateSnapshotRequest`
`callback`	`Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.ICreateSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

createSubscription(request, options)

createSubscription(request?: protos.google.pubsub.v1.ISubscription, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISubscription,
        protos.google.pubsub.v1.ISubscription | undefined,
        {} | undefined
    ]>;

Creates a subscription to a given topic. See the [resource name rules] (https://cloud.google.com/pubsub/docs/admin#resource_names). If the subscription already exists, returns ALREADY_EXISTS. If the corresponding topic doesn't exist, returns NOT_FOUND.

If the name is not provided in the request, the server will assign a random name for this subscription on the same project as the topic, conforming to the [resource name format] (https://cloud.google.com/pubsub/docs/admin#resource_names). The generated name is populated in the returned Subscription object. Note that for REST API requests, you must specify a name in the request.

Parameters
Name	Description
`request`	`ISubscription` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.ISubscription \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing . Please see the documentation for more details and examples.

createSubscription(request, options, callback)

createSubscription(request: protos.google.pubsub.v1.ISubscription, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.ISubscription | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`ISubscription`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.ISubscription \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

createSubscription(request, callback)

createSubscription(request: protos.google.pubsub.v1.ISubscription, callback: Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.ISubscription | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`ISubscription`
`callback`	`Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.ISubscription \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

deleteSnapshot(request, options)

deleteSnapshot(request?: protos.google.pubsub.v1.IDeleteSnapshotRequest, options?: CallOptions): Promise<[
        protos.google.protobuf.IEmpty,
        protos.google.pubsub.v1.IDeleteSnapshotRequest | undefined,
        {} | undefined
    ]>;

Removes an existing snapshot. Snapshots are used in [Seek] (https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. When the snapshot is deleted, all messages retained in the snapshot are immediately dropped. After a snapshot is deleted, a new one may be created with the same name, but the new one has no association with the old snapshot or its subscription, unless the same subscription is specified.

Parameters
Name	Description
`request`	`IDeleteSnapshotRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSnapshotRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Empty. Please see the documentation for more details and examples.

deleteSnapshot(request, options, callback)

deleteSnapshot(request: protos.google.pubsub.v1.IDeleteSnapshotRequest, options: CallOptions, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IDeleteSnapshotRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

deleteSnapshot(request, callback)

deleteSnapshot(request: protos.google.pubsub.v1.IDeleteSnapshotRequest, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IDeleteSnapshotRequest`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

deleteSubscription(request, options)

deleteSubscription(request?: protos.google.pubsub.v1.IDeleteSubscriptionRequest, options?: CallOptions): Promise<[
        protos.google.protobuf.IEmpty,
        protos.google.pubsub.v1.IDeleteSubscriptionRequest | undefined,
        {} | undefined
    ]>;

Deletes an existing subscription. All messages retained in the subscription are immediately dropped. Calls to Pull after deletion will return NOT_FOUND. After a subscription is deleted, a new one may be created with the same name, but the new one has no association with the old subscription or its topic unless the same topic is specified.

Parameters
Name	Description
`request`	`IDeleteSubscriptionRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSubscriptionRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Empty. Please see the documentation for more details and examples.

deleteSubscription(request, options, callback)

deleteSubscription(request: protos.google.pubsub.v1.IDeleteSubscriptionRequest, options: CallOptions, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSubscriptionRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IDeleteSubscriptionRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSubscriptionRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

deleteSubscription(request, callback)

deleteSubscription(request: protos.google.pubsub.v1.IDeleteSubscriptionRequest, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSubscriptionRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IDeleteSubscriptionRequest`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IDeleteSubscriptionRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

getIamPolicy(request, options, callback)

getIamPolicy(request: IamProtos.google.iam.v1.GetIamPolicyRequest, options?: gax.CallOptions | Callback<IamProtos.google.iam.v1.Policy, IamProtos.google.iam.v1.GetIamPolicyRequest | null | undefined, {} | null | undefined>, callback?: Callback<IamProtos.google.iam.v1.Policy, IamProtos.google.iam.v1.GetIamPolicyRequest | null | undefined, {} | null | undefined>): Promise<[IamProtos.google.iam.v1.Policy]>;

Gets the access control policy for a resource. Returns an empty policy if the resource exists and does not have a policy set.

Parameters
Name	Description
`request`	`IamProtos.google.iam.v1.GetIamPolicyRequest` The request object that will be sent.
`options`	`CallOptions \| Callback<google.iam.v1.Policy, google.iam.v1.GetIamPolicyRequest \| null \| undefined, {} \| null \| undefined>` Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
`callback`	`Callback<google.iam.v1.Policy, google.iam.v1.GetIamPolicyRequest \| null \| undefined, {} \| null \| undefined>` The function which will be called with the result of the API call. The second parameter to the callback is an object representing .

Returns
Type	Description
`Promise<[google.iam.v1.Policy]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing . The promise has a method named "cancel" which cancels the ongoing API call.

getProjectId()

getProjectId(): Promise<string>;

Returns
Type	Description
`Promise<string>`

getProjectId(callback)

getProjectId(callback: Callback<string, undefined, undefined>): void;

Parameter
Name	Description
`callback`	`Callback<string, undefined, undefined>`

Returns
Type	Description
`void`

getSnapshot(request, options)

getSnapshot(request?: protos.google.pubsub.v1.IGetSnapshotRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISnapshot,
        protos.google.pubsub.v1.IGetSnapshotRequest | undefined,
        {} | undefined
    ]>;

Gets the configuration details of a snapshot. Snapshots are used in [Seek](https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Parameters
Name	Description
`request`	`IGetSnapshotRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IGetSnapshotRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Snapshot. Please see the documentation for more details and examples.

getSnapshot(request, options, callback)

getSnapshot(request: protos.google.pubsub.v1.IGetSnapshotRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IGetSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IGetSnapshotRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IGetSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

getSnapshot(request, callback)

getSnapshot(request: protos.google.pubsub.v1.IGetSnapshotRequest, callback: Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IGetSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IGetSnapshotRequest`
`callback`	`Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IGetSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

getSubscription(request, options)

getSubscription(request?: protos.google.pubsub.v1.IGetSubscriptionRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISubscription,
        protos.google.pubsub.v1.IGetSubscriptionRequest | undefined,
        {} | undefined
    ]>;

Gets the configuration details of a subscription.

Parameters
Name	Description
`request`	`IGetSubscriptionRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IGetSubscriptionRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing . Please see the documentation for more details and examples.

getSubscription(request, options, callback)

getSubscription(request: protos.google.pubsub.v1.IGetSubscriptionRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IGetSubscriptionRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IGetSubscriptionRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IGetSubscriptionRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

getSubscription(request, callback)

getSubscription(request: protos.google.pubsub.v1.IGetSubscriptionRequest, callback: Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IGetSubscriptionRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IGetSubscriptionRequest`
`callback`	`Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IGetSubscriptionRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

initialize()

initialize(): Promise<{
        [name: string]: Function;
    }>;

Initialize the client. Performs asynchronous operations (such as authentication) and prepares the client. This function will be called automatically when any class method is called for the first time, but if you need to initialize it before calling an actual method, feel free to call initialize() directly.

You can await on this method if you want to make sure the client is initialized.

Returns
Type	Description
`Promise<{ [name: string]: Function; }>`	{Promise} A promise that resolves to an authenticated service stub.

listSnapshots(request, options)

listSnapshots(request?: protos.google.pubsub.v1.IListSnapshotsRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISnapshot[],
        protos.google.pubsub.v1.IListSnapshotsRequest | null,
        protos.google.pubsub.v1.IListSnapshotsResponse
    ]>;

Lists the existing snapshots. Snapshots are used in [Seek]( https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Parameters
Name	Description
`request`	`IListSnapshotsRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns

Type Description

Promise<[
        protos.google.pubsub.v1.ISnapshot[],
        protos.google.pubsub.v1.IListSnapshotsRequest | null,
        protos.google.pubsub.v1.IListSnapshotsResponse
    ]>

{Promise} - The promise which resolves to an array. The first element of the array is Array of Snapshot. The client library will perform auto-pagination by default: it will call the API as many times as needed and will merge results from all the pages into this array. Note that it can affect your quota. We recommend using listSnapshotsAsync() method described below for async iteration which you can stop as needed. Please see the documentation for more details and examples.

listSnapshots(request, options, callback)

listSnapshots(request: protos.google.pubsub.v1.IListSnapshotsRequest, options: CallOptions, callback: PaginationCallback<protos.google.pubsub.v1.IListSnapshotsRequest, protos.google.pubsub.v1.IListSnapshotsResponse | null | undefined, protos.google.pubsub.v1.ISnapshot>): void;

Parameters
Name	Description
`request`	`IListSnapshotsRequest`
`options`	`CallOptions`
`callback`	`PaginationCallback<protos.google.pubsub.v1.IListSnapshotsRequest, protos.google.pubsub.v1.IListSnapshotsResponse \| null \| undefined, protos.google.pubsub.v1.ISnapshot>`

Returns
Type	Description
`void`

listSnapshots(request, callback)

listSnapshots(request: protos.google.pubsub.v1.IListSnapshotsRequest, callback: PaginationCallback<protos.google.pubsub.v1.IListSnapshotsRequest, protos.google.pubsub.v1.IListSnapshotsResponse | null | undefined, protos.google.pubsub.v1.ISnapshot>): void;

Parameters
Name	Description
`request`	`IListSnapshotsRequest`
`callback`	`PaginationCallback<protos.google.pubsub.v1.IListSnapshotsRequest, protos.google.pubsub.v1.IListSnapshotsResponse \| null \| undefined, protos.google.pubsub.v1.ISnapshot>`

Returns
Type	Description
`void`

listSnapshotsAsync(request, options)

listSnapshotsAsync(request?: protos.google.pubsub.v1.IListSnapshotsRequest, options?: CallOptions): AsyncIterable<protos.google.pubsub.v1.ISnapshot>;

Equivalent to listSnapshots, but returns an iterable object.

for-await-of syntax is used with the iterable to get response elements on-demand.

Parameters
Name	Description
`request`	`IListSnapshotsRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`AsyncIterable<protos.google.pubsub.v1.ISnapshot>`	{Object} An iterable Object that allows async iteration. When you iterate the returned iterable, each element will be an object representing Snapshot. The API will be called under the hood as needed, once per the page, so you can stop the iteration when you don't need more results. Please see the documentation for more details and examples.

listSnapshotsStream(request, options)

listSnapshotsStream(request?: protos.google.pubsub.v1.IListSnapshotsRequest, options?: CallOptions): Transform;

Equivalent to method.name.toCamelCase(), but returns a NodeJS Stream object.

Parameters
Name	Description
`request`	`IListSnapshotsRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns

Type Description

Transform

{Stream} An object stream which emits an object representing Snapshot on 'data' event. The client library will perform auto-pagination by default: it will call the API as many times as needed. Note that it can affect your quota. We recommend using listSnapshotsAsync() method described below for async iteration which you can stop as needed. Please see the documentation for more details and examples.

listSubscriptions(request, options)

listSubscriptions(request?: protos.google.pubsub.v1.IListSubscriptionsRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISubscription[],
        protos.google.pubsub.v1.IListSubscriptionsRequest | null,
        protos.google.pubsub.v1.IListSubscriptionsResponse
    ]>;

Lists matching subscriptions.

Parameters
Name	Description
`request`	`IListSubscriptionsRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns

Type Description

Promise<[
        protos.google.pubsub.v1.ISubscription[],
        protos.google.pubsub.v1.IListSubscriptionsRequest | null,
        protos.google.pubsub.v1.IListSubscriptionsResponse
    ]>

{Promise} - The promise which resolves to an array. The first element of the array is Array of . The client library will perform auto-pagination by default: it will call the API as many times as needed and will merge results from all the pages into this array. Note that it can affect your quota. We recommend using listSubscriptionsAsync() method described below for async iteration which you can stop as needed. Please see the documentation for more details and examples.

listSubscriptions(request, options, callback)

listSubscriptions(request: protos.google.pubsub.v1.IListSubscriptionsRequest, options: CallOptions, callback: PaginationCallback<protos.google.pubsub.v1.IListSubscriptionsRequest, protos.google.pubsub.v1.IListSubscriptionsResponse | null | undefined, protos.google.pubsub.v1.ISubscription>): void;

Parameters
Name	Description
`request`	`IListSubscriptionsRequest`
`options`	`CallOptions`
`callback`	`PaginationCallback<protos.google.pubsub.v1.IListSubscriptionsRequest, protos.google.pubsub.v1.IListSubscriptionsResponse \| null \| undefined, protos.google.pubsub.v1.ISubscription>`

Returns
Type	Description
`void`

listSubscriptions(request, callback)

listSubscriptions(request: protos.google.pubsub.v1.IListSubscriptionsRequest, callback: PaginationCallback<protos.google.pubsub.v1.IListSubscriptionsRequest, protos.google.pubsub.v1.IListSubscriptionsResponse | null | undefined, protos.google.pubsub.v1.ISubscription>): void;

Parameters
Name	Description
`request`	`IListSubscriptionsRequest`
`callback`	`PaginationCallback<protos.google.pubsub.v1.IListSubscriptionsRequest, protos.google.pubsub.v1.IListSubscriptionsResponse \| null \| undefined, protos.google.pubsub.v1.ISubscription>`

Returns
Type	Description
`void`

listSubscriptionsAsync(request, options)

listSubscriptionsAsync(request?: protos.google.pubsub.v1.IListSubscriptionsRequest, options?: CallOptions): AsyncIterable<protos.google.pubsub.v1.ISubscription>;

Equivalent to listSubscriptions, but returns an iterable object.

for-await-of syntax is used with the iterable to get response elements on-demand.

Parameters
Name	Description
`request`	`IListSubscriptionsRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`AsyncIterable<protos.google.pubsub.v1.ISubscription>`	{Object} An iterable Object that allows async iteration. When you iterate the returned iterable, each element will be an object representing . The API will be called under the hood as needed, once per the page, so you can stop the iteration when you don't need more results. Please see the documentation for more details and examples.

listSubscriptionsStream(request, options)

listSubscriptionsStream(request?: protos.google.pubsub.v1.IListSubscriptionsRequest, options?: CallOptions): Transform;

Equivalent to method.name.toCamelCase(), but returns a NodeJS Stream object.

Parameters
Name	Description
`request`	`IListSubscriptionsRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Transform`	{Stream} An object stream which emits an object representing on 'data' event. The client library will perform auto-pagination by default: it will call the API as many times as needed. Note that it can affect your quota. We recommend using `listSubscriptionsAsync()` method described below for async iteration which you can stop as needed. Please see the documentation for more details and examples.

matchProjectFromProjectName(projectName)

matchProjectFromProjectName(projectName: string): string | number;

Parse the project from Project resource.

Parameter
Name	Description
`projectName`	`string` A fully-qualified path representing Project resource.

Returns
Type	Description
`string \| number`	{string} A string representing the project.

matchProjectFromProjectTopicName(projectTopicName)

matchProjectFromProjectTopicName(projectTopicName: string): string | number;

Parse the project from ProjectTopic resource.

Parameter
Name	Description
`projectTopicName`	`string` A fully-qualified path representing project_topic resource.

Returns
Type	Description
`string \| number`	{string} A string representing the project.

matchProjectFromSchemaName(schemaName)

matchProjectFromSchemaName(schemaName: string): string | number;

Parse the project from Schema resource.

Parameter
Name	Description
`schemaName`	`string` A fully-qualified path representing Schema resource.

Returns
Type	Description
`string \| number`	{string} A string representing the project.

matchProjectFromSnapshotName(snapshotName)

matchProjectFromSnapshotName(snapshotName: string): string | number;

Parse the project from Snapshot resource.

Parameter
Name	Description
`snapshotName`	`string` A fully-qualified path representing Snapshot resource.

Returns
Type	Description
`string \| number`	{string} A string representing the project.

matchProjectFromSubscriptionName(subscriptionName)

matchProjectFromSubscriptionName(subscriptionName: string): string | number;

Parse the project from Subscription resource.

Parameter
Name	Description
`subscriptionName`	`string` A fully-qualified path representing Subscription resource.

Returns
Type	Description
`string \| number`	{string} A string representing the project.

matchSchemaFromSchemaName(schemaName)

matchSchemaFromSchemaName(schemaName: string): string | number;

Parse the schema from Schema resource.

Parameter
Name	Description
`schemaName`	`string` A fully-qualified path representing Schema resource.

Returns
Type	Description
`string \| number`	{string} A string representing the schema.

matchSnapshotFromSnapshotName(snapshotName)

matchSnapshotFromSnapshotName(snapshotName: string): string | number;

Parse the snapshot from Snapshot resource.

Parameter
Name	Description
`snapshotName`	`string` A fully-qualified path representing Snapshot resource.

Returns
Type	Description
`string \| number`	{string} A string representing the snapshot.

matchSubscriptionFromSubscriptionName(subscriptionName)

matchSubscriptionFromSubscriptionName(subscriptionName: string): string | number;

Parse the subscription from Subscription resource.

Parameter
Name	Description
`subscriptionName`	`string` A fully-qualified path representing Subscription resource.

Returns
Type	Description
`string \| number`	{string} A string representing the subscription.

matchTopicFromProjectTopicName(projectTopicName)

matchTopicFromProjectTopicName(projectTopicName: string): string | number;

Parse the topic from ProjectTopic resource.

Parameter
Name	Description
`projectTopicName`	`string` A fully-qualified path representing project_topic resource.

Returns
Type	Description
`string \| number`	{string} A string representing the topic.

modifyAckDeadline(request, options)

modifyAckDeadline(request?: protos.google.pubsub.v1.IModifyAckDeadlineRequest, options?: CallOptions): Promise<[
        protos.google.protobuf.IEmpty,
        protos.google.pubsub.v1.IModifyAckDeadlineRequest | undefined,
        {} | undefined
    ]>;

Modifies the ack deadline for a specific message. This method is useful to indicate that more time is needed to process a message by the subscriber, or to make the message available for redelivery if the processing was interrupted. Note that this does not modify the subscription-level ackDeadlineSeconds used for subsequent messages.

Parameters
Name	Description
`request`	`IModifyAckDeadlineRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyAckDeadlineRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Empty. Please see the documentation for more details and examples.

modifyAckDeadline(request, options, callback)

modifyAckDeadline(request: protos.google.pubsub.v1.IModifyAckDeadlineRequest, options: CallOptions, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyAckDeadlineRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IModifyAckDeadlineRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyAckDeadlineRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

modifyAckDeadline(request, callback)

modifyAckDeadline(request: protos.google.pubsub.v1.IModifyAckDeadlineRequest, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyAckDeadlineRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IModifyAckDeadlineRequest`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyAckDeadlineRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

modifyPushConfig(request, options)

modifyPushConfig(request?: protos.google.pubsub.v1.IModifyPushConfigRequest, options?: CallOptions): Promise<[
        protos.google.protobuf.IEmpty,
        protos.google.pubsub.v1.IModifyPushConfigRequest | undefined,
        {} | undefined
    ]>;

Modifies the PushConfig for a specified subscription.

This may be used to change a push subscription to a pull one (signified by an empty PushConfig) or vice versa, or change the endpoint URL and other attributes of a push subscription. Messages will accumulate for delivery continuously through the call regardless of changes to the PushConfig.

Parameters
Name	Description
`request`	`IModifyPushConfigRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyPushConfigRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Empty. Please see the documentation for more details and examples.

modifyPushConfig(request, options, callback)

modifyPushConfig(request: protos.google.pubsub.v1.IModifyPushConfigRequest, options: CallOptions, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyPushConfigRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IModifyPushConfigRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyPushConfigRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

modifyPushConfig(request, callback)

modifyPushConfig(request: protos.google.pubsub.v1.IModifyPushConfigRequest, callback: Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyPushConfigRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IModifyPushConfigRequest`
`callback`	`Callback<protos.google.protobuf.IEmpty, protos.google.pubsub.v1.IModifyPushConfigRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

projectPath(project)

projectPath(project: string): string;

Return a fully-qualified project resource name string.

Parameter
Name	Description
`project`	`string`

Returns
Type	Description
`string`	{string} Resource name string.

projectTopicPath(project, topic)

projectTopicPath(project: string, topic: string): string;

Return a fully-qualified projectTopic resource name string.

Parameters
Name	Description
`project`	`string`
`topic`	`string`

Returns
Type	Description
`string`	{string} Resource name string.

pull(request, options)

pull(request?: protos.google.pubsub.v1.IPullRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.IPullResponse,
        protos.google.pubsub.v1.IPullRequest | undefined,
        {} | undefined
    ]>;

Pulls messages from the server.

Parameters
Name	Description
`request`	`IPullRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.IPullResponse, protos.google.pubsub.v1.IPullRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing PullResponse. Please see the documentation for more details and examples.

pull(request, options, callback)

pull(request: protos.google.pubsub.v1.IPullRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.IPullResponse, protos.google.pubsub.v1.IPullRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IPullRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.IPullResponse, protos.google.pubsub.v1.IPullRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

pull(request, callback)

pull(request: protos.google.pubsub.v1.IPullRequest, callback: Callback<protos.google.pubsub.v1.IPullResponse, protos.google.pubsub.v1.IPullRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IPullRequest`
`callback`	`Callback<protos.google.pubsub.v1.IPullResponse, protos.google.pubsub.v1.IPullRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

schemaPath(project, schema)

schemaPath(project: string, schema: string): string;

Return a fully-qualified schema resource name string.

Parameters
Name	Description
`project`	`string`
`schema`	`string`

Returns
Type	Description
`string`	{string} Resource name string.

seek(request, options)

seek(request?: protos.google.pubsub.v1.ISeekRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISeekResponse,
        protos.google.pubsub.v1.ISeekRequest | undefined,
        {} | undefined
    ]>;

Seeks an existing subscription to a point in time or to a given snapshot, whichever is provided in the request. Snapshots are used in [Seek] (https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot. Note that both the subscription and the snapshot must be on the same topic.

Parameters
Name	Description
`request`	`ISeekRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISeekResponse, protos.google.pubsub.v1.ISeekRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing SeekResponse. Please see the documentation for more details and examples.

seek(request, options, callback)

seek(request: protos.google.pubsub.v1.ISeekRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISeekResponse, protos.google.pubsub.v1.ISeekRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`ISeekRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISeekResponse, protos.google.pubsub.v1.ISeekRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

seek(request, callback)

seek(request: protos.google.pubsub.v1.ISeekRequest, callback: Callback<protos.google.pubsub.v1.ISeekResponse, protos.google.pubsub.v1.ISeekRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`ISeekRequest`
`callback`	`Callback<protos.google.pubsub.v1.ISeekResponse, protos.google.pubsub.v1.ISeekRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

setIamPolicy(request, options, callback)

setIamPolicy(request: IamProtos.google.iam.v1.SetIamPolicyRequest, options?: gax.CallOptions | Callback<IamProtos.google.iam.v1.Policy, IamProtos.google.iam.v1.SetIamPolicyRequest | null | undefined, {} | null | undefined>, callback?: Callback<IamProtos.google.iam.v1.Policy, IamProtos.google.iam.v1.SetIamPolicyRequest | null | undefined, {} | null | undefined>): Promise<[IamProtos.google.iam.v1.Policy]>;

Returns permissions that a caller has on the specified resource. If the resource does not exist, this will return an empty set of permissions, not a NOT_FOUND error.

Note: This operation is designed to be used for building permission-aware UIs and command-line tools, not for authorization checking. This operation may "fail open" without warning.

Parameters
Name	Description
`request`	`IamProtos.google.iam.v1.SetIamPolicyRequest` The request object that will be sent.
`options`	`CallOptions \| Callback<google.iam.v1.Policy, google.iam.v1.SetIamPolicyRequest \| null \| undefined, {} \| null \| undefined>` Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
`callback`	`Callback<google.iam.v1.Policy, google.iam.v1.SetIamPolicyRequest \| null \| undefined, {} \| null \| undefined>` The function which will be called with the result of the API call. The second parameter to the callback is an object representing .

Returns
Type	Description
`Promise<[google.iam.v1.Policy]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing . The promise has a method named "cancel" which cancels the ongoing API call.

snapshotPath(project, snapshot)

snapshotPath(project: string, snapshot: string): string;

Return a fully-qualified snapshot resource name string.

Parameters
Name	Description
`project`	`string`
`snapshot`	`string`

Returns
Type	Description
`string`	{string} Resource name string.

streamingPull(options)

streamingPull(options?: CallOptions): gax.CancellableStream;

Establishes a stream with the server, which sends messages down to the client. The client streams acknowledgements and ack deadline modifications back to the server. The server will close the stream and return the status on any error. The server may close the stream with status UNAVAILABLE to reassign server-side resources, in which case, the client should re-establish the stream. Flow control can be achieved by configuring the underlying RPC channel.

Parameter
Name	Description
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`gax.CancellableStream`	{Stream} An object stream which is both readable and writable. It accepts objects representing StreamingPullRequest for write() method, and will emit objects representing on 'data' event asynchronously. Please see the documentation for more details and examples.

subscriptionPath(project, subscription)

subscriptionPath(project: string, subscription: string): string;

Return a fully-qualified subscription resource name string.

Parameters
Name	Description
`project`	`string`
`subscription`	`string`

Returns
Type	Description
`string`	{string} Resource name string.

testIamPermissions(request, options, callback)

testIamPermissions(request: IamProtos.google.iam.v1.TestIamPermissionsRequest, options?: gax.CallOptions | Callback<IamProtos.google.iam.v1.TestIamPermissionsResponse, IamProtos.google.iam.v1.TestIamPermissionsRequest | null | undefined, {} | null | undefined>, callback?: Callback<IamProtos.google.iam.v1.TestIamPermissionsResponse, IamProtos.google.iam.v1.TestIamPermissionsRequest | null | undefined, {} | null | undefined>): Promise<[IamProtos.google.iam.v1.TestIamPermissionsResponse]>;

Returns permissions that a caller has on the specified resource. If the resource does not exist, this will return an empty set of permissions, not a NOT_FOUND error.

Note: This operation is designed to be used for building permission-aware UIs and command-line tools, not for authorization checking. This operation may "fail open" without warning.

Parameters
Name	Description
`request`	`IamProtos.google.iam.v1.TestIamPermissionsRequest` The request object that will be sent.
`options`	`CallOptions \| Callback<google.iam.v1.TestIamPermissionsResponse, google.iam.v1.TestIamPermissionsRequest \| null \| undefined, {} \| null \| undefined>` Optional parameters. You can override the default settings for this call, e.g, timeout, retries, paginations, etc. See gax.CallOptions for the details.
`callback`	`Callback<google.iam.v1.TestIamPermissionsResponse, google.iam.v1.TestIamPermissionsRequest \| null \| undefined, {} \| null \| undefined>` The function which will be called with the result of the API call. The second parameter to the callback is an object representing .

Returns
Type	Description
`Promise<[google.iam.v1.TestIamPermissionsResponse]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing . The promise has a method named "cancel" which cancels the ongoing API call.

updateSnapshot(request, options)

updateSnapshot(request?: protos.google.pubsub.v1.IUpdateSnapshotRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISnapshot,
        protos.google.pubsub.v1.IUpdateSnapshotRequest | undefined,
        {} | undefined
    ]>;

Updates an existing snapshot. Snapshots are used in [Seek](https://cloud.google.com/pubsub/docs/replay-overview) operations, which allow you to manage message acknowledgments in bulk. That is, you can set the acknowledgment state of messages in an existing subscription to the state captured by a snapshot.

Parameters
Name	Description
`request`	`IUpdateSnapshotRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IUpdateSnapshotRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing Snapshot. Please see the documentation for more details and examples.

updateSnapshot(request, options, callback)

updateSnapshot(request: protos.google.pubsub.v1.IUpdateSnapshotRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IUpdateSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IUpdateSnapshotRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IUpdateSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

updateSnapshot(request, callback)

updateSnapshot(request: protos.google.pubsub.v1.IUpdateSnapshotRequest, callback: Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IUpdateSnapshotRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IUpdateSnapshotRequest`
`callback`	`Callback<protos.google.pubsub.v1.ISnapshot, protos.google.pubsub.v1.IUpdateSnapshotRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

updateSubscription(request, options)

updateSubscription(request?: protos.google.pubsub.v1.IUpdateSubscriptionRequest, options?: CallOptions): Promise<[
        protos.google.pubsub.v1.ISubscription,
        protos.google.pubsub.v1.IUpdateSubscriptionRequest | undefined,
        {} | undefined
    ]>;

Updates an existing subscription. Note that certain properties of a subscription, such as its topic, are not modifiable.

Parameters
Name	Description
`request`	`IUpdateSubscriptionRequest` The request object that will be sent.
`options`	`CallOptions` Call options. See CallOptions for more details.

Returns
Type	Description
`Promise<[ protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IUpdateSubscriptionRequest \| undefined, {} \| undefined ]>`	{Promise} - The promise which resolves to an array. The first element of the array is an object representing . Please see the documentation for more details and examples.

updateSubscription(request, options, callback)

updateSubscription(request: protos.google.pubsub.v1.IUpdateSubscriptionRequest, options: CallOptions, callback: Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IUpdateSubscriptionRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IUpdateSubscriptionRequest`
`options`	`CallOptions`
`callback`	`Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IUpdateSubscriptionRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`

updateSubscription(request, callback)

updateSubscription(request: protos.google.pubsub.v1.IUpdateSubscriptionRequest, callback: Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IUpdateSubscriptionRequest | null | undefined, {} | null | undefined>): void;

Parameters
Name	Description
`request`	`IUpdateSubscriptionRequest`
`callback`	`Callback<protos.google.pubsub.v1.ISubscription, protos.google.pubsub.v1.IUpdateSubscriptionRequest \| null \| undefined, {} \| null \| undefined>`

Returns
Type	Description
`void`