public com.google.cloud.speech.v1p1beta1.SpeechAdaptation getAdaptation() {
      if (adaptationBuilder_ == null) {
        return adaptation_ == null
            ? com.google.cloud.speech.v1p1beta1.SpeechAdaptation.getDefaultInstance()
            : adaptation_;
      } else {
        return adaptationBuilder_.getMessage();
      }
    }
<pre>
Speech adaptation configuration improves the accuracy of speech
recognition. For more information, see the [speech
adaptation](https://cloud.google.com/speech-to-text/docs/adaptation)
documentation.
When speech adaptation is set it supersedes the `speech_contexts` field.
</pre>

<code>.google.cloud.speech.v1p1beta1.SpeechAdaptation adaptation = 20;</code>

@return The adaptation.
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/RecognitionConfig.java