@java.lang.Override
  public com.google.protobuf.Parser<UpdateCustomClassRequest> getParserForType() {
    return PARSER;
  }
<pre>
If set, validate the request and preview the updated CustomClass, but do
not actually update it.
</pre>

<code>bool validate_only = 4;</code>

@return This builder for chaining.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/UpdateCustomClassRequest.java