Type of data parameter for GdkPixbuf.Pixbuf.new_from_data is incorrect

[some00]

Documentation says it should be bytes, but it's marked as GLib.Bytes in the stubs.
I tried passing GLib.Bytes, but then I received the following error:

File ".../gi/overrides/GdkPixbuf.py", line 53, in new_from_data
    data = GLib.Bytes.new(data)
TypeError: Must be sequence, not Bytes