def nl_cb_clone(orig):
return copy.deepcopy(orig)<EOL>
Clone an existing callback handle.

    https://github.com/thom311/libnl/blob/libnl3_2_25/lib/handlers.c#L230

    Positional arguments:
    orig -- original callback handle (nl_cb class instance).

    Returns:
    New nl_cb instance being a duplicate of `orig`.