Hello Community!

i need to create a custom filter in the grid catalog which should be displayed in the sidebar. I read the documentation on extending the grid catalog. But I still don't know whats the proper filestructure to create a new filter. 

Is there a decent way to do so?

My filter should sort tags by there restrictions (audience, organisation, position). I have a plugin which adds those restriction to each tag in a new database table. 

Greetings Max.