gtk:widget-observe-controllers (widget)

widget -- a gtk:widget object

The g:list-model object tracking the controllers of widet.

Returns a g:list-model object to track the gtk:event-controller objects of widget.

Calling this function will enable extra internal bookkeeping to track controllers and emit signals on the returned list model. It may slow down operations a lot. Applications should try hard to avoid calling this function because of the slowdowns.