public static com.google.protobuf.Parser<ExplanationSpec> parser() {
    return PARSER;
  }
<pre>
Optional. Metadata describing the Model's input and output for explanation.
</pre>

<code>
.google.cloud.vertexai.v1.ExplanationMetadata metadata = 2 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/ExplanationSpec.java