def METHOD_NAME(self, perm):
    r"""
    Return the transport of this subset along the permutation perm.
    EXAMPLES::
        sage: F = species.SubsetSpecies()
        sage: a = F.structures(["a", "b", "c"])[5]; a
        {'a', 'c'}
        sage: p = PermutationGroupElement((1,2))
        sage: a.transport(p)
        {'b', 'c'}
        sage: p = PermutationGroupElement((1,3))
        sage: a.transport(p)
        {'a', 'c'}
    """
    l = sorted([perm(i) for i in self._list])
    return SubsetSpeciesStructure(self.parent(), self._labels, l)