@java.lang.Override
    public Builder clear() {
      super.clear();
      bitField0_ = 0;
      if (phraseSetsBuilder_ == null) {
        phraseSets_ = java.util.Collections.emptyList();
      } else {
        phraseSets_ = null;
        phraseSetsBuilder_.clear();
      }
      bitField0_ = (bitField0_ & ~0x00000001);
      phraseSetReferences_ = com.google.protobuf.LazyStringArrayList.emptyList();
      if (customClassesBuilder_ == null) {
        customClasses_ = java.util.Collections.emptyList();
      } else {
        customClasses_ = null;
        customClassesBuilder_.clear();
      }
      bitField0_ = (bitField0_ & ~0x00000004);
      abnfGrammar_ = null;
      if (abnfGrammarBuilder_ != null) {
        abnfGrammarBuilder_.dispose();
        abnfGrammarBuilder_ = null;
      }
      return this;
    }
<pre>
Speech adaptation configuration.
</pre>

Protobuf type {@code google.cloud.speech.v1p1beta1.SpeechAdaptation}
java-speech/proto-google-cloud-speech-v1p1beta1/src/main/java/com/google/cloud/speech/v1p1beta1/SpeechAdaptation.java