public static function getInstance(
        $classname, $input = "", $userDefFunction = null
    ) {
        $fullname = "soloproyectos\\css\\parser\\filter\\"
            . $classname;
        return new $fullname($input, $userDefFunction);
    }
public static function getInstance(
        $classname, $input = "", $userDefFunction = null
    ) {
        $fullname = "soloproyectos\\css\\parser\\filter\\"
            . $classname;
        return new $fullname($input, $userDefFunction);
    }
public static function getInstance ( $ classname , $ input = "" , $ userDefFunction = null ) { $ fullname = "soloproyectos\\css\\parser\\filter\\" . $ classname ; return new $ fullname ( $ input , $ userDefFunction ) ; }
Gets a psuedo-filter instance by class name.

@param string  $classname       Class name
@param string  $input           String input (default is "")
@param Closure $userDefFunction Used defined function (not required)

@return CssParserFilterPseudo
Gets a psuedo - filter instance by class name .