@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, getUpdateMask());
    }
    if (((bitField0_ & 0x00000002) != 0)) {
      size += com.google.protobuf.CodedOutputStream.computeMessageSize(2, getDraft());
    }
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(requestId_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, requestId_);
    }
    if (allowMissing_ != false) {
      size += com.google.protobuf.CodedOutputStream.computeBoolSize(4, allowMissing_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
If true, UpdateDraftRequest will create one resource if the target resource
doesn't exist, this time, the field_mask will be ignored.
</pre>

<code>bool allow_missing = 4;</code>

@return The allowMissing.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/UpdateDraftRequest.java