public function transform( $target = null, $controller = null, $action = null, array $params = array(), array $trailing = array(), array $config = array() )
	{
		return '';
	}
public function transform( $target = null, $controller = null, $action = null, array $params = array(), array $trailing = array(), array $config = array() )
	{
		return '';
	}
public function transform ( $ target = null , $ controller = null , $ action = null , array $ params = array ( ) , array $ trailing = array ( ) , array $ config = array ( ) ) { return '' ; }
Returns an empty string as URL.

@param string|null $target Route or page which should be the target of the link (if any)
@param string|null $controller Name of the controller which should be part of the link (if any)
@param string|null $action Name of the action which should be part of the link (if any)
@param array $params Associative list of parameters that should be part of the URL
@param string[] $trailing Trailing URL parts that are not relevant to identify the resource (for pretty URLs)
@param array $config Additional configuration parameter per URL
@return string Complete URL that can be used in the template
Returns an empty string as URL .