WP_REST_Request::__construct( string $method = '', string $route = '', array $attributes = array() )

	public function __construct( $method = '', $route = '', $attributes = array() ) {
		$this->params = array(
			'URL'   => array(),
			'GET'   => array(),
			'POST'  => array(),
			'FILES' => array(),

			// See parse_json_params.
			'JSON'  => null,

			'defaults' => array(),
		);

		$this->set_method( $method );
		$this->set_route( $route );
		$this->set_attributes( $attributes );
	}