public Builder setCustomClass(com.google.cloud.speech.v2.CustomClass.Builder builderForValue) {
      if (customClassBuilder_ == null) {
        customClass_ = builderForValue.build();
      } else {
        customClassBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<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