public com.google.protobuf.FieldMask getUpdateMask() {
      if (updateMaskBuilder_ == null) {
        return updateMask_ == null
            ? com.google.protobuf.FieldMask.getDefaultInstance()
            : updateMask_;
      } else {
        return updateMaskBuilder_.getMessage();
      }
    }
<pre>
The list of fields to be updated.
</pre>

<code>.google.protobuf.FieldMask update_mask = 2;</code>

@return The updateMask.
java-speech/proto-google-cloud-speech-v2/src/main/java/com/google/cloud/speech/v2/UpdateConfigRequest.java