public Builder removeElements(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      internalGetMutableElements().ensureBuilderMap().remove(key);
      return this;
    }
<pre>
A map from elements' keys to element's annotation value.
</pre>

<code>map&lt;string, .google.cloud.visionai.v1.AnnotationValue&gt; elements = 2;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/AnnotationCustomizedStruct.java