get_wl_seat
Description:
Returns the Wayland `wl_seat` of a `GdkSeat`.
Parameters:
| this | a `GdkSeat` | 
Returns:
| a Wayland `wl_seat` | 
Returns the Wayland `wl_seat` of a `GdkSeat`.
| this | a `GdkSeat` | 
| a Wayland `wl_seat` |