unselect_range
Description:
Unselects a range of nodes, determined by start_path and end_path inclusive.
Parameters:
| this | |
| start_path | 
           The initial node of the range.  | 
      
| end_path | 
           The initial node of the range.  | 
      
Unselects a range of nodes, determined by start_path and end_path inclusive.
| this | |
| start_path | 
           The initial node of the range.  | 
      
| end_path | 
           The initial node of the range.  |