pub unsafe extern "C" fn g_file_replace_async(
    file: *mut GFile,
    etag: *const c_char,
    make_backup: gboolean,
    flags: GFileCreateFlags,
    io_priority: c_int,
    cancellable: *mut GCancellable,
    callback: GAsyncReadyCallback,
    user_data: gpointer
)