A target publish or event time. Can be used for seeking to or retrieving the corresponding cursor.
| JSON representation | 
|---|
| { // Union field | 
| Fields | |
|---|---|
| Union field time. The type of message time to query.timecan be only one of the following: | |
| publishTime | 
 Request the cursor of the first message with publish time greater than or equal to  A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples:  | 
| eventTime | 
 Request the cursor of the first message with event time greater than or equal to  A timestamp in RFC3339 UTC "Zulu" format, with nanosecond resolution and up to nine fractional digits. Examples:  |