get_input_hints
Description:
Gets the `input-hints` of the `GtkTextView`.
Parameters:
| this | 
           a `GtkTextView`  | 
      
Returns:
| 
           the input hints  | 
      
Gets the `input-hints` of the `GtkTextView`.
| this | 
           a `GtkTextView`  | 
      
| 
           the input hints  |