public function transform( $name = null, $default = null )
	{
		if( $name === null ) {
			return $this->_params;
		}

		$parts = explode( '/', trim( $name, '/' ) );
		$param = $this->_params;

		foreach( $parts as $part )
		{
			if( isset( $param[$part] ) ) {
				$param = $param[$part];
			} else {
				return $default;
			}
		}

		return $param;
	}