def _parse_flowcontrol_send(self, config):
        value = 'off'
        match = re.search(r'flowcontrol send (\w+)$', config, re.M)
        if match:
            value = match.group(1)
        return dict(flowcontrol_send=value)
Extend this method to implement custom permission checking
dataset/ETHPy150Open arista-eosplus/pyeapi/pyeapi/api/interfaces.py/EthernetInterface._parse_flowcontrol_send--crossover with--dataset/ETHPy150Open gmr/tinman/tinman/handlers/mixins.py/ModelAPIMixin.has_create_permission