def setup_i3(self):
p = self.__setup_via_pairs_layers()
il1 = ImageLayer("foo", bytes(b"12344"))
il2 = ImageLayer("bar", bytes(b"12345"))
il3 = ImageLayer("quux", bytes(b"12346"))
p.imagery.add_imagelayer(il1)
p.imagery.add_imagelayer(il2)
p.imagery.add_imagelayer(il3)
p.stackup.layers[0].imagelayers = [il1, il2]
p.stackup.layers[1].imagelayers = [il3]
return p
