queue_allocate
Description:
[ Version ( since = "3.20" ) ]
public void queue_allocate ()
  public void queue_allocate ()
This function is only for use in widget implementations.
Flags the widget for a rerun of the GtkWidgetClass:GtkWidget:size_allocate function. Use this function instead of 
      queue_resize when the this's size request 
      didn't change but it wants to reposition its contents.
An example user of this function is set_halign.
Parameters:
| this | a Widget |