Function gio_sys::g_mount_eject_with_operation

pub unsafe extern fn g_mount_eject_with_operation(mount: *mut GMount,
                                                  flags: GMountUnmountFlags,
                                                  mount_operation: *mut GMountOperation,
                                                  cancellable: *mut GCancellable,
                                                  callback: GAsyncReadyCallback,
                                                  user_data: gpointer)