@java.lang.Override
      protected Builder newBuilderForType(
          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
        Builder builder = new Builder(parent);
        return builder;
      }
<pre>
How the original image is displayed in the visualization.
Adjusting the overlay can help increase visual clarity if the original
image makes it difficult to view the visualization. Defaults to NONE.
</pre>

<code>
.google.cloud.vertexai.v1.ExplanationMetadata.InputMetadata.Visualization.OverlayType overlay_type = 6;
</code>

@return The overlayType.
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ExplanationMetadata.java