@java.lang.Override
  public boolean hasUpdateMask() {
    return ((bitField0_ & 0x00000001) != 0);
  }
<pre>
Field mask is used to specify the fields to be overwritten in the Pool
resource by the update. You can only update the following fields:

* `networkConfig`

The fields specified in the update_mask are relative to the resource, not
the full request. A field will be overwritten if it is in the mask.
</pre>

<code>.google.protobuf.FieldMask update_mask = 1;</code>

@return Whether the updateMask field is set.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/UpdatePoolRequest.java