The Gtk.Bin widget is a container with just one child.
It is not very useful itself, but it is useful for deriving subclasses,
since it provides common code needed for handling a single child widget.
Many GTK+ widgets are subclasses of Gtk.Bin, including Gtk.Window,
Gtk.Button, Gtk.Frame, Gtk.HandleBox or Gtk.ScrolledWindow.
- 
get_child()[source]
- 
| Returns: | the child of self, or Noneif it does
not have a child. | 
|---|
 | Return type: | Gtk.WidgetorNone | 
|---|
 
 - Gets the child of the - Gtk.Bin, or- Noneif the bin contains
no child widget. The returned widget does not have a reference
added, so you do not need to unref it.