I am asking because I noticed that every editor windows gets the same set of bindings set and destroyed, (as in the other part of the #24801 patch).  Since events have a widget attribute, using bound methods with a self parameter is not necessary, so all the duplication seems redundant.  But class_binding to Text is too broad.  It there any way to register 'subclasses', similar to the way one can register style options as applying to a subset of, for instance, all Buttons?