set_model
Description:
Sets the model that this should wrap.
If model is null, this will be empty.
Parameters:
| this | 
           a `GtkSingleSelection`  | 
      
| model | 
           A `GListModel` to wrap  | 
      
Sets the model that this should wrap.
If model is null, this will be empty.
| this | 
           a `GtkSingleSelection`  | 
      
| model | 
           A `GListModel` to wrap  |