get_default
Description:
Gets the default `GdkDisplay`.
This is a convenience function for:
gdk_display_manager_get_default_display (gdk_display_manager_get ())
Returns:
| a `GdkDisplay`, or null if there is no default display | 
Gets the default `GdkDisplay`.
This is a convenience function for:
gdk_display_manager_get_default_display (gdk_display_manager_get ())
| a `GdkDisplay`, or null if there is no default display |