private void ensureAlternativesIsMutable() {
      if (!((bitField0_ & 0x00000001) != 0)) {
        alternatives_ =
            new java.util.ArrayList<com.google.cloud.speech.v1.SpeechRecognitionAlternative>(
                alternatives_);
        bitField0_ |= 0x00000001;
      }
    }
<pre>
A streaming speech recognition result corresponding to a portion of the audio
that is currently being processed.
</pre>

Protobuf type {@code google.cloud.speech.v1.StreamingRecognitionResult}
java-speech/proto-google-cloud-speech-v1/src/main/java/com/google/cloud/speech/v1/StreamingRecognitionResult.java