See base class.

def _from_binary_b_ace(cls, binary_stream):
    """See base class."""
    ''' Access rights flags - 4
        SID - n
    '''
    access_flags = cls._REPR.unpack(binary_stream[:cls._REPR.size])[0]
    sid = SID.create_from_binary(binary_stream[cls._REPR.size:])

    nw_obj = cls((ACEAccessFlags(access_flags), sid))

    return nw_obj