Gets whether gtk_widget_set_vexpand() has been used to explicitly set the expand flag on this widget.
See [method@Gtk.Widget.get_hexpand_set] for more detail.
whether vexpand has been explicitly set
See Implementation
Gets whether gtk_widget_set_vexpand() has been used to explicitly set the expand flag on this widget.
See [method@Gtk.Widget.get_hexpand_set] for more detail.