@java.lang.Override
  public com.google.cloud.vertexai.api.ExplanationMetadataOverrideOrBuilder getMetadataOrBuilder() {
    return metadata_ == null
        ? com.google.cloud.vertexai.api.ExplanationMetadataOverride.getDefaultInstance()
        : metadata_;
  }
<pre>
The metadata to be overridden. If not specified, no metadata is overridden.
</pre>

<code>.google.cloud.vertexai.v1.ExplanationMetadataOverride metadata = 2;</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ExplanationSpecOverride.java