code: func (ps *PrintSettings) GetBool(key string) bool {
  	cstr := C.CString(key)
  	defer C.free(unsafe.Pointer(cstr))
  	c := C.gtk_print_settings_get_bool(ps.native(), (*C.gchar)(cstr))
  	return gobool(c)
  }
docs: // GetBool() is a wrapper around gtk_print_settings_get_bool().