@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(1, getWorkstationCluster());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      output.writeMessage(2, getUpdateMask());
    }
    if (validateOnly_ != false) {
      output.writeBool(3, validateOnly_);
    }
    if (allowMissing_ != false) {
      output.writeBool(4, allowMissing_);
    }
    getUnknownFields().writeTo(output);
  }
<pre>
Optional. If set, and the workstation cluster is not found, a new
workstation cluster will be created. In this situation, update_mask is
ignored.
</pre>

<code>bool allow_missing = 4 [(.google.api.field_behavior) = OPTIONAL];</code>

@return The allowMissing.
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/UpdateWorkstationClusterRequest.java