set_use_font
Description:
If use_font is `TRUE`, the font name will be written using the selected font.
Parameters:
| this | a `GtkFontDialogButton` | 
| use_font | If `TRUE`, font name will be written using the chosen font | 
If use_font is `TRUE`, the font name will be written using the selected font.
| this | a `GtkFontDialogButton` | 
| use_font | If `TRUE`, font name will be written using the chosen font |