set_range
Description:
Sets the allowable values in the `GtkRange`.
The range value is clamped to be between min and max. (If the range has a non-zero page size, it is clamped between 
      min and max - page-size.)
Parameters:
| this | 
           a `GtkRange`  | 
      
| min | 
           minimum range value  | 
      
| max | 
           maximum range value  |