public Builder addSpeechContexts(
        int index, com.google.cloud.speech.v1p1beta1.SpeechContext.Builder builderForValue) {
      if (speechContextsBuilder_ == null) {
        ensureSpeechContextsIsMutable();
        speechContexts_.add(index, builderForValue.build());
        onChanged();
      } else {
        speechContextsBuilder_.addMessage(index, builderForValue.build());
      }
      return this;
    }
<pre>
Array of [SpeechContext][google.cloud.speech.v1p1beta1.SpeechContext].
A means to provide context to assist the speech recognition. For more
information, see
[speech
adaptation](https://cloud.google.com/speech-to-text/docs/adaptation).
</pre>

<code>repeated .google.cloud.speech.v1p1beta1.SpeechContext speech_contexts = 6;</code>
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/RecognitionConfig.java