@java.lang.Override
  public com.google.protobuf.FieldMask getUpdateMask() {
    return updateMask_ == null ? com.google.protobuf.FieldMask.getDefaultInstance() : updateMask_;
  }
<pre>
Required. Update mask is used to specify the fields to be overwritten in
the `deployment` resource by the update.
</pre>

<code>.google.protobuf.FieldMask update_mask = 2 [(.google.api.field_behavior) = REQUIRED];
</code>

@return The updateMask.
java-telcoautomation/proto-google-cloud-telcoautomation-v1alpha1/src/main/java/com/google/cloud/telcoautomation/v1alpha1/UpdateDeploymentRequest.java