@classmethod
def load_tables(cls, tables, **kwargs):
    """
        Creates the :class:`SlimTreeSequence` defined by the tables.

        :param TableCollection tables: A set of tables, as produced by SLiM
            or by annotate_defaults().
        :param TableCollection reference_sequence: An optional string of ACGT giving
            the reference sequence.
        :rtype SlimTreeSequence:
        """
    ts = tables.tree_sequence()
    return cls(ts, **kwargs)
