@java.lang.Override
  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
      internalGetFieldAccessorTable() {
    return com.google.cloud.vertexai.api.ToolProto
        .internal_static_google_cloud_vertexai_v1_FunctionDeclaration_fieldAccessorTable
        .ensureFieldAccessorsInitialized(
            com.google.cloud.vertexai.api.FunctionDeclaration.class,
            com.google.cloud.vertexai.api.FunctionDeclaration.Builder.class);
  }
<pre>
Structured representation of a function declaration as defined by the
[OpenAPI 3.0 specification](https://spec.openapis.org/oas/v3.0.3). Included
in this declaration are the function name, description, parameters and
response type. This FunctionDeclaration is a representation of a block of
code that can be used as a `Tool` by the model and executed by the client.
</pre>

Protobuf type {@code google.cloud.vertexai.v1.FunctionDeclaration}
java-vertexai/proto-google-cloud-vertexai-v1/src/main/java/com/google/cloud/vertexai/api/FunctionDeclaration.java