private com.google.protobuf.RepeatedFieldBuilderV3<
            com.google.cloud.speech.v2.CustomClass,
            com.google.cloud.speech.v2.CustomClass.Builder,
            com.google.cloud.speech.v2.CustomClassOrBuilder>
        getCustomClassesFieldBuilder() {
      if (customClassesBuilder_ == null) {
        customClassesBuilder_ =
            new com.google.protobuf.RepeatedFieldBuilderV3<
                com.google.cloud.speech.v2.CustomClass,
                com.google.cloud.speech.v2.CustomClass.Builder,
                com.google.cloud.speech.v2.CustomClassOrBuilder>(
                customClasses_,
                ((bitField0_ & 0x00000001) != 0),
                getParentForChildren(),
                isClean());
        customClasses_ = null;
      }
      return customClassesBuilder_;
    }
<pre>
The list of requested CustomClasses.
</pre>

<code>repeated .google.cloud.speech.v2.CustomClass custom_classes = 1;</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/ListCustomClassesResponse.java