Add a seat to the focus list.
Evas allows the Efl.Canvas.Object to be focused by multiple seats at the same time. This function adds a new seat to the focus list. In other words, after the seat is added to the list this object will now be also focused by this new seat.
Since 1.22
seat_focus_add @beta { params { @in seat: Efl.Input.Device; } return: bool; }
Eina_Bool efl_canvas_object_seat_focus_add(Eo *obj, Efl_Input_Device *seat);
null
for the default seat.