queueResize
Flags a widget to have its size renegotiated.
This should be called when a widget for some reason has a new size request. For example, when you change the text in a class@Gtk.Label, the label queues a resize to ensure there’s enough space for the new text.
Note that you cannot call gtk_widget_queue_resize() on a widget from inside its implementation of the vfunc@Gtk.Widget.size_allocate virtual method. Calls to gtk_widget_queue_resize() from inside vfunc@Gtk.Widget.size_allocate will be silently ignored.
This function is only for use in widget implementations.