@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (((bitField0_ & 0x00000001) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getWorkstationConfig());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getUpdateMask());
    }
    if (validateOnly_ != false) {
      size += com.google.protobuf.CodedOutputStream.computeBoolSize(3, validateOnly_);
    }
    if (allowMissing_ != false) {
      size += com.google.protobuf.CodedOutputStream.computeBoolSize(4, allowMissing_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
Optional. If set and the workstation configuration is not found, a new
workstation configuration 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-v1/src/main/java/com/google/cloud/workstations/v1/UpdateWorkstationConfigRequest.java