// transition. This may be sometimes undesired but *is*
// necessary and if you look carefully, all GTK+ programs using
// GtkExpander perform this trick (e.g. the standard "open file"
// transition. This may be sometimes undesired but *is*
// necessary and if you look carefully, all GTK+ programs using
// GtkExpander perform this trick (e.g. the standard "open file"