A streaming speech recognition result corresponding to a
portion of the audio that is currently being processed.
If false, this StreamingRecognitionResult represents
an interim result that may change. If true, this is the
final time the speech service will return this particular
StreamingRecognitionResult, the recognizer will not return
any further hypotheses for this portion of the transcript and
corresponding audio.
Time offset of the end of this result relative to the
beginning of the audio.
The BCP-47 <https://www.rfc-editor.org/rfc/bcp/bcp47.txt>__
language tag of the language in this result. This language
code was detected to have the most likelihood of being spoken
in the audio.
