public Builder putElements(
        java.lang.String key, com.google.cloud.visionai.v1.AnnotationValue value) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      if (value == null) {
        throw new NullPointerException("map value");
      }
      internalGetMutableElements().ensureBuilderMap().put(key, value);
      bitField0_ |= 0x00000001;
      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