public int getAnnotationsCount() {
      return internalGetAnnotations().getMap().size();
    }
<pre>
Labels as key value pairs
</pre>

<code>map&lt;string, string&gt; labels = 4;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Cluster.java