set_from_stock
  
  Description:
  public bool set_from_stock (
Widget widget, 
string stock_id, 
IconSize icon_size) 
throws Error
   
  
    Sets the contents of this using the stock icon stock_id, as rendered by widget.
    Parameters:
    
      
        | this | 
        
           a Texture 
         | 
      
      
        | widget | 
        
           a Widget 
         | 
      
      
        | stock_id | 
        
           the stock id of the icon 
         | 
      
      
        | icon_size | 
        
           the size of the icon, or -1 
         | 
      
    
    Returns:
    
      
        | 
           true on success, false on failure. 
         |