SpeechEventType(value)Indicates the type of speech event.
Values:
SPEECH_EVENT_TYPE_UNSPECIFIED (0):
No speech event specified.
END_OF_SINGLE_UTTERANCE (1):
This event indicates that the server has detected the end of
the user's speech utterance and expects no additional
speech. Therefore, the server will not process additional
audio (although it may subsequently return additional
results). When the client receives 'END_OF_SINGLE_UTTERANCE'
event, the client should stop sending the requests. However,
clients should keep receiving remaining responses until the
stream is terminated. To construct the complete sentence in
a streaming way, one should override (if 'is_final' of
previous response is false), or append (if 'is_final' of
previous response is true). This event is only sent if
single_utterance was set to true, and is not used
otherwise.