Describes the progress of a long-running LongRunningRecognize
call. It is included in the metadata field of the Operation
returned by the GetOperation call of the
Approximate percentage of audio processed
thus far. Guaranteed to be 100 when the audio is
fully processed and the results are available.
Time when the request was received.
Time of the most recent processing update.
Output only. The URI of the audio file being
transcribed. Empty if the audio was sent as byte