MessageType(value)Type of the response message.
Values:
MESSAGE_TYPE_UNSPECIFIED (0):
Not specified. Should never be used.
TRANSCRIPT (1):
Message contains a (possibly partial)
transcript.
END_OF_SINGLE_UTTERANCE (2):
This event indicates that the server has detected the end of
the user's speech utterance and expects no additional
inputs. Therefore, the server will not process additional
audio (although it may subsequently return additional
results). The client should stop sending additional audio
data, half-close the gRPC connection, and wait for any
additional results until the server closes the gRPC
connection. This message is only sent if
single_utterance was set to true, and is not used
otherwise.