Function gio_sys::g_file_eject_mountable_with_operation

pub unsafe extern fn g_file_eject_mountable_with_operation(file: *mut GFile,
                                                           flags: GMountUnmountFlags,
                                                           mount_operation: *mut GMountOperation,
                                                           cancellable: *mut GCancellable,
                                                           callback: GAsyncReadyCallback,
                                                           user_data: gpointer)