public int getElementsCount() {
    return internalGetElements().getMap().size();
  }
<pre>
Customized struct represnation in annotation.
</pre>

Protobuf type {@code google.cloud.visionai.v1.AnnotationCustomizedStruct}
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/AnnotationCustomizedStruct.java