Can't use custom filter with arguments in constructor

[digislexia]

If my custom filter requires some arguments in constructor, for example i want to pass column name, operator for query etc. then i cant use this filter because of $currentFilter = new $filter; line in globalFiltered. Maybe it will be useful to check type of $filter and if it is already object just use it instead of trying to create new instance.
My current workaround - set all required properties in separated methods instead of passing them to constructor.