get_request_mode
Description:
Gets whether the area prefers a height-for-width layout or a width-for-height layout.
Parameters:
| this | 
           a `GtkCellArea`  | 
      
Returns:
| 
           The `GtkSizeRequestMode` preferred by this.  | 
      
Gets whether the area prefers a height-for-width layout or a width-for-height layout.
| this | 
           a `GtkCellArea`  | 
      
| 
           The `GtkSizeRequestMode` preferred by this.  |