def VisitParameter(self, p):
    if (p.mutated_type is None):
        return p
    else:
        return p.Replace(type=pytd_utils.JoinTypes([p.type, p.mutated_type]), mutated_type=None)
def VisitParameter(self, p):
    if (p.mutated_type is None):
        return p
    else:
        return p.Replace(type=pytd_utils.JoinTypes([p.type, p.mutated_type]), mutated_type=None)