WP_REST_Templates_Controller::get_item( WP_REST_Request $request ): WP_REST_Response|WP_Error

333	public function get_item( $request ) {334		if ( isset( $request['source'] ) && ( 'theme' === $request['source'] || 'plugin' === $request['source'] ) ) {335			$template = get_block_file_template( $request['id'], $this->post_type );336		} else {337			$template = get_block_template( $request['id'], $this->post_type );338		}339 340		if ( ! $template ) {341			return new WP_Error( 'rest_template_not_found', __( 'No templates exist with that id.' ), array( 'status' => 404 ) );342		}343 344		return $this->prepare_item_for_response( $template, $request );345	}