gtkmm-4: Widget wrappers can't be deleted like in gtkmm-3

From: Kjell Ahlstedt <kjellahlstedt gmail com>
To: "gtkmm-list gnome org" <gtkmm-list gnome org>
Subject: gtkmm-4: Widget wrappers can't be deleted like in gtkmm-3
Date: Fri, 1 Dec 2017 13:35:01 +0100

Changes in gtk+-4 make it impossible to delete C++ widget wrappers like it's done in Gtk::Object::~Object() and Gtk::Object::_release_c_instance(). See https://bugzilla.gnome.org/show_bug.cgi?id=773642#c20. How can we do it in gtkmm-4? Comments ans suggestions are welcome.

Follow-Ups:
- Re: gtkmm-4: Widget wrappers can't be deleted like in gtkmm-3
  - From: Chris Vine

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