@reducer('and_expr', 'and', 'check')
    def _extend_and_expr(self, and_expr, _and, check):

        return [('and_expr', and_expr.add_check(check))]
Extend an 'and_expr' by adding one more check.
dataset/ETHPy150Open CiscoSystems/avos/openstack_dashboard/openstack/common/policy.py/ParseState._extend_and_expr