get_wl_pointer
Description:
Returns the Wayland `wl_pointer` of a `GdkDevice`.
Parameters:
| this | a `GdkDevice` | 
Returns:
| a Wayland `wl_pointer` | 
Returns the Wayland `wl_pointer` of a `GdkDevice`.
| this | a `GdkDevice` | 
| a Wayland `wl_pointer` |