Class AnalyticsHubServiceClient (2.15.1)

Version 2.15.1

• 2.32.0-rc (latest)
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The AnalyticsHubService API facilitates data sharing within and across organizations.

It allows data providers to publish listings that reference shared datasets. With Analytics Hub, users can discover and search for listings that they have access to. Subscribers can view and subscribe to listings. When you subscribe to a listing, Analytics Hub creates a linked dataset in your project.

Equality

Instances of this class created via copy-construction or copy-assignment always compare equal. Instances created with equal std::shared_ptr<*Connection> objects compare equal. Objects that compare equal share the same underlying resources.

Performance

Creating a new instance of this class is a relatively expensive operation, new objects establish new connections to the service. In contrast, copy-construction, move-construction, and the corresponding assignment operations are relatively efficient as the copies share all underlying resources.

Thread Safety

Concurrent access to different instances of this class, even if they compare equal, is guaranteed to work. Two or more threads operating on the same instance of this class is not guaranteed to work. Since copy-construction and move-construction is a relatively efficient operation, consider using such a copy when using this class from multiple threads.

Constructors

AnalyticsHubServiceClient(AnalyticsHubServiceClient const &)

Copy and move support

Parameter
Name	Description
	AnalyticsHubServiceClient const &

AnalyticsHubServiceClient(AnalyticsHubServiceClient &&)

Copy and move support

Parameter
Name	Description
	AnalyticsHubServiceClient &&

AnalyticsHubServiceClient(std::shared_ptr< AnalyticsHubServiceConnection >, Options)

Parameters
Name	Description
connection	std::shared_ptr< AnalyticsHubServiceConnection >
opts	Options

Operators

operator=(AnalyticsHubServiceClient const &)

Copy and move support

Parameter
Name	Description
	AnalyticsHubServiceClient const &

Returns
Type	Description
AnalyticsHubServiceClient &

operator=(AnalyticsHubServiceClient &&)

Copy and move support

Parameter
Name	Description
	AnalyticsHubServiceClient &&

Returns
Type	Description
AnalyticsHubServiceClient &

Functions

ListDataExchanges(std::string const &, Options)

Lists all data exchanges in a given project and location.

Parameters
Name	Description
parent	std::string const & Required. The parent resource path of the data exchanges. e.g. projects/myproject/locations/US.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StreamRange< google::cloud::bigquery::analyticshub::v1::DataExchange >	a StreamRange to iterate of the results. See the documentation of this type for details. In brief, this class has begin() and end() member functions returning a iterator class meeting the input iterator requirements. The value type for this iterator is a StatusOr as the iteration may fail even after some values are retrieved successfully, for example, if there is a network disconnect. An empty set of results does not indicate an error, it indicates that there are no resources meeting the request criteria. On a successful iteration the StatusOr<T> contains elements of type google.cloud.bigquery.analyticshub.v1.DataExchange, or rather, the C++ class generated by Protobuf from that type. Please consult the Protobuf documentation for details on the Protobuf mapping rules.

ListDataExchanges(google::cloud::bigquery::analyticshub::v1::ListDataExchangesRequest, Options)

Lists all data exchanges in a given project and location.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::ListDataExchangesRequest Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.ListDataExchangesRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StreamRange< google::cloud::bigquery::analyticshub::v1::DataExchange >	a StreamRange to iterate of the results. See the documentation of this type for details. In brief, this class has begin() and end() member functions returning a iterator class meeting the input iterator requirements. The value type for this iterator is a StatusOr as the iteration may fail even after some values are retrieved successfully, for example, if there is a network disconnect. An empty set of results does not indicate an error, it indicates that there are no resources meeting the request criteria. On a successful iteration the StatusOr<T> contains elements of type google.cloud.bigquery.analyticshub.v1.DataExchange, or rather, the C++ class generated by Protobuf from that type. Please consult the Protobuf documentation for details on the Protobuf mapping rules.

ListOrgDataExchanges(std::string const &, Options)

Lists all data exchanges from projects in a given organization and location.

Parameters
Name	Description
organization	std::string const & Required. The organization resource path of the projects containing DataExchanges. e.g. organizations/myorg/locations/US.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StreamRange< google::cloud::bigquery::analyticshub::v1::DataExchange >	a StreamRange to iterate of the results. See the documentation of this type for details. In brief, this class has begin() and end() member functions returning a iterator class meeting the input iterator requirements. The value type for this iterator is a StatusOr as the iteration may fail even after some values are retrieved successfully, for example, if there is a network disconnect. An empty set of results does not indicate an error, it indicates that there are no resources meeting the request criteria. On a successful iteration the StatusOr<T> contains elements of type google.cloud.bigquery.analyticshub.v1.DataExchange, or rather, the C++ class generated by Protobuf from that type. Please consult the Protobuf documentation for details on the Protobuf mapping rules.

ListOrgDataExchanges(google::cloud::bigquery::analyticshub::v1::ListOrgDataExchangesRequest, Options)

Lists all data exchanges from projects in a given organization and location.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::ListOrgDataExchangesRequest Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.ListOrgDataExchangesRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StreamRange< google::cloud::bigquery::analyticshub::v1::DataExchange >	a StreamRange to iterate of the results. See the documentation of this type for details. In brief, this class has begin() and end() member functions returning a iterator class meeting the input iterator requirements. The value type for this iterator is a StatusOr as the iteration may fail even after some values are retrieved successfully, for example, if there is a network disconnect. An empty set of results does not indicate an error, it indicates that there are no resources meeting the request criteria. On a successful iteration the StatusOr<T> contains elements of type google.cloud.bigquery.analyticshub.v1.DataExchange, or rather, the C++ class generated by Protobuf from that type. Please consult the Protobuf documentation for details on the Protobuf mapping rules.

GetDataExchange(std::string const &, Options)

Gets the details of a data exchange.

Parameters
Name	Description
name	std::string const & Required. The resource name of the data exchange. e.g. projects/myproject/locations/US/dataExchanges/123.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::DataExchange >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.DataExchange) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

GetDataExchange(google::cloud::bigquery::analyticshub::v1::GetDataExchangeRequest const &, Options)

Gets the details of a data exchange.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::GetDataExchangeRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.GetDataExchangeRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::DataExchange >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.DataExchange) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

CreateDataExchange(std::string const &, google::cloud::bigquery::analyticshub::v1::DataExchange const &, Options)

Creates a new data exchange.

Parameters
Name	Description
parent	std::string const & Required. The parent resource path of the data exchange. e.g. projects/myproject/locations/US.
data_exchange	google::cloud::bigquery::analyticshub::v1::DataExchange const & Required. The data exchange to create.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::DataExchange >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.DataExchange) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

CreateDataExchange(google::cloud::bigquery::analyticshub::v1::CreateDataExchangeRequest const &, Options)

Creates a new data exchange.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::CreateDataExchangeRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.CreateDataExchangeRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::DataExchange >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.DataExchange) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

UpdateDataExchange(google::cloud::bigquery::analyticshub::v1::DataExchange const &, google::protobuf::FieldMask const &, Options)

Updates an existing data exchange.

Parameters
Name	Description
data_exchange	google::cloud::bigquery::analyticshub::v1::DataExchange const & Required. The data exchange to update.
update_mask	google::protobuf::FieldMask const & Required. Field mask specifies the fields to update in the data exchange resource. The fields specified in the updateMask are relative to the resource and are not a full request.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::DataExchange >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.DataExchange) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

UpdateDataExchange(google::cloud::bigquery::analyticshub::v1::UpdateDataExchangeRequest const &, Options)

Updates an existing data exchange.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::UpdateDataExchangeRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.UpdateDataExchangeRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::DataExchange >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.DataExchange) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

DeleteDataExchange(std::string const &, Options)

Deletes an existing data exchange.

Parameters
Name	Description
name	std::string const & Required. The full name of the data exchange resource that you want to delete. For example, projects/myproject/locations/US/dataExchanges/123.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
Status	a Status object. If the request failed, the status contains the details of the failure.

DeleteDataExchange(google::cloud::bigquery::analyticshub::v1::DeleteDataExchangeRequest const &, Options)

Deletes an existing data exchange.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::DeleteDataExchangeRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.DeleteDataExchangeRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
Status	a Status object. If the request failed, the status contains the details of the failure.

ListListings(std::string const &, Options)

Lists all listings in a given project and location.

Parameters
Name	Description
parent	std::string const & Required. The parent resource path of the listing. e.g. projects/myproject/locations/US/dataExchanges/123.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StreamRange< google::cloud::bigquery::analyticshub::v1::Listing >	a StreamRange to iterate of the results. See the documentation of this type for details. In brief, this class has begin() and end() member functions returning a iterator class meeting the input iterator requirements. The value type for this iterator is a StatusOr as the iteration may fail even after some values are retrieved successfully, for example, if there is a network disconnect. An empty set of results does not indicate an error, it indicates that there are no resources meeting the request criteria. On a successful iteration the StatusOr<T> contains elements of type google.cloud.bigquery.analyticshub.v1.Listing, or rather, the C++ class generated by Protobuf from that type. Please consult the Protobuf documentation for details on the Protobuf mapping rules.

ListListings(google::cloud::bigquery::analyticshub::v1::ListListingsRequest, Options)

Lists all listings in a given project and location.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::ListListingsRequest Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.ListListingsRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StreamRange< google::cloud::bigquery::analyticshub::v1::Listing >	a StreamRange to iterate of the results. See the documentation of this type for details. In brief, this class has begin() and end() member functions returning a iterator class meeting the input iterator requirements. The value type for this iterator is a StatusOr as the iteration may fail even after some values are retrieved successfully, for example, if there is a network disconnect. An empty set of results does not indicate an error, it indicates that there are no resources meeting the request criteria. On a successful iteration the StatusOr<T> contains elements of type google.cloud.bigquery.analyticshub.v1.Listing, or rather, the C++ class generated by Protobuf from that type. Please consult the Protobuf documentation for details on the Protobuf mapping rules.

GetListing(std::string const &, Options)

Gets the details of a listing.

Parameters
Name	Description
name	std::string const & Required. The resource name of the listing. e.g. projects/myproject/locations/US/dataExchanges/123/listings/456.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::Listing >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.Listing) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

GetListing(google::cloud::bigquery::analyticshub::v1::GetListingRequest const &, Options)

Gets the details of a listing.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::GetListingRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.GetListingRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::Listing >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.Listing) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

CreateListing(std::string const &, google::cloud::bigquery::analyticshub::v1::Listing const &, Options)

Creates a new listing.

Parameters
Name	Description
parent	std::string const & Required. The parent resource path of the listing. e.g. projects/myproject/locations/US/dataExchanges/123.
listing	google::cloud::bigquery::analyticshub::v1::Listing const & Required. The listing to create.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::Listing >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.Listing) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

CreateListing(google::cloud::bigquery::analyticshub::v1::CreateListingRequest const &, Options)

Creates a new listing.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::CreateListingRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.CreateListingRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::Listing >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.Listing) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

UpdateListing(google::cloud::bigquery::analyticshub::v1::Listing const &, google::protobuf::FieldMask const &, Options)

Updates an existing listing.

Parameters
Name	Description
listing	google::cloud::bigquery::analyticshub::v1::Listing const & Required. The listing to update.
update_mask	google::protobuf::FieldMask const & Required. Field mask specifies the fields to update in the listing resource. The fields specified in the updateMask are relative to the resource and are not a full request.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::Listing >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.Listing) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

UpdateListing(google::cloud::bigquery::analyticshub::v1::UpdateListingRequest const &, Options)

Updates an existing listing.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::UpdateListingRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.UpdateListingRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::Listing >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.Listing) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

DeleteListing(std::string const &, Options)

Deletes a listing.

Parameters
Name	Description
name	std::string const & Required. Resource name of the listing to delete. e.g. projects/myproject/locations/US/dataExchanges/123/listings/456.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
Status	a Status object. If the request failed, the status contains the details of the failure.

DeleteListing(google::cloud::bigquery::analyticshub::v1::DeleteListingRequest const &, Options)

Deletes a listing.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::DeleteListingRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.DeleteListingRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
Status	a Status object. If the request failed, the status contains the details of the failure.

SubscribeListing(std::string const &, Options)

Subscribes to a listing.

Currently, with Analytics Hub, you can create listings that reference only BigQuery datasets. Upon subscription to a listing for a BigQuery dataset, Analytics Hub creates a linked dataset in the subscriber's project.

Parameters
Name	Description
name	std::string const & Required. Resource name of the listing that you want to subscribe to. e.g. projects/myproject/locations/US/dataExchanges/123/listings/456.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::SubscribeListingResponse >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.SubscribeListingResponse) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

SubscribeListing(google::cloud::bigquery::analyticshub::v1::SubscribeListingRequest const &, Options)

Subscribes to a listing.

Currently, with Analytics Hub, you can create listings that reference only BigQuery datasets. Upon subscription to a listing for a BigQuery dataset, Analytics Hub creates a linked dataset in the subscriber's project.

Parameters
Name	Description
request	google::cloud::bigquery::analyticshub::v1::SubscribeListingRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.cloud.bigquery.analyticshub.v1.SubscribeListingRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::cloud::bigquery::analyticshub::v1::SubscribeListingResponse >	the result of the RPC. The response message type (google.cloud.bigquery.analyticshub.v1.SubscribeListingResponse) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

GetIamPolicy(google::iam::v1::GetIamPolicyRequest const &, Options)

Gets the IAM policy.

Parameters
Name	Description
request	google::iam::v1::GetIamPolicyRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.iam.v1.GetIamPolicyRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::iam::v1::Policy >	the result of the RPC. The response message type (google.iam.v1.Policy) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

SetIamPolicy(google::iam::v1::SetIamPolicyRequest const &, Options)

Sets the IAM policy.

Parameters
Name	Description
request	google::iam::v1::SetIamPolicyRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.iam.v1.SetIamPolicyRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::iam::v1::Policy >	the result of the RPC. The response message type (google.iam.v1.Policy) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.

TestIamPermissions(google::iam::v1::TestIamPermissionsRequest const &, Options)

Returns the permissions that a caller has.

Parameters
Name	Description
request	google::iam::v1::TestIamPermissionsRequest const & Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.iam.v1.TestIamPermissionsRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts	Options Optional. Override the class-level options, such as retry and backoff policies.

Returns
Type	Description
StatusOr< google::iam::v1::TestIamPermissionsResponse >	the result of the RPC. The response message type (google.iam.v1.TestIamPermissionsResponse) is mapped to a C++ class using the Protobuf mapping rules. If the request fails, the StatusOr contains the error details.