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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def default_setup():
 """The default API setup for lxc4u This is the API that you access globally from lxc4u. """

    service = LXCService
    lxc_types = dict(LXC=LXC, LXCWithOverlays=LXCWithOverlays,
            __default__=UnmanagedLXC)
    loader = LXCLoader(lxc_types, service)
    manager = LXCManager(loader, service)
    return LXCAPI(manager=manager, service=service)