set_page_ranges
Description:
Sets the value of gtk_print_settings_page_ranges.
Parameters:
| this | 
           a `GtkPrintSettings`  | 
      
| page_ranges | 
           an array of `GtkPageRange`s  | 
      
| num_ranges | 
           the length of   | 
      
Sets the value of gtk_print_settings_page_ranges.
| this | 
           a `GtkPrintSettings`  | 
      
| page_ranges | 
           an array of `GtkPageRange`s  | 
      
| num_ranges | 
           the length of   |