public function redirectTo( $url = 0, $code = 302 ) {
		if ( $url === null ) {
			$this->redirectTo = null;
			return true;
		}
		if ( !is_string( $url ) || !is_int( $code ) ) {
			return false;
		}
		$this->redirectTo = [ $url, $code ];
		return true;
	}