public com.google.cloud.speech.v2.CustomClassOrBuilder getCustomClassOrBuilder() {
      if (customClassBuilder_ != null) {
        return customClassBuilder_.getMessageOrBuilder();
      } else {
        return customClass_ == null
            ? com.google.cloud.speech.v2.CustomClass.getDefaultInstance()
            : customClass_;
      }
    }
<pre>
Required. The CustomClass to update.

The CustomClass's `name` field is used to identify the CustomClass to
update. Format:
`projects/{project}/locations/{location}/customClasses/{custom_class}`.
</pre>

<code>
.google.cloud.speech.v2.CustomClass custom_class = 1 [(.google.api.field_behavior) = REQUIRED];
</code>
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/UpdateCustomClassRequest.java