Function gio_sys::g_settings_bind_with_mapping

pub unsafe extern fn g_settings_bind_with_mapping(settings: *mut GSettings,
                                                  key: *const c_char,
                                                  object: *mut GObject,
                                                  property: *const c_char,
                                                  flags: GSettingsBindFlags,
                                                  get_mapping: GSettingsBindGetMapping,
                                                  set_mapping: GSettingsBindSetMapping,
                                                  user_data: gpointer,
                                                  destroy: GDestroyNotify)