public com.google.cloud.vertexai.api.SchemaOrBuilder getResponseOrBuilder() {
      if (responseBuilder_ != null) {
        return responseBuilder_.getMessageOrBuilder();
      } else {
        return response_ == null
            ? com.google.cloud.vertexai.api.Schema.getDefaultInstance()
            : response_;
      }
    }
<pre>
Optional. Describes the output from this function in JSON Schema format.
Reflects the Open API 3.03 Response Object. The Schema defines the type
used for the response value of the function.
</pre>

<code>
.google.cloud.vertexai.v1.Schema response = 4 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/FunctionDeclaration.java