GNOME Bugzilla – Bug 622186
Missing getter: gtk_button_get_in_button
Last modified: 2011-02-04 16:12:18 UTC
There is no way to access GtkButton::in_button in gtk+ 3.0. See bug #577469 for the underlying problem (which might be a gtk+ bug itself).
Luckily it works without this one.
See http://git.gnome.org/browse/gdl/commit/?id=871caa26dad9c58a14c6e89bc3687db827ed6302 for how-to.