def set_check_idx(self, check_idx=True):
        if not check_idx:
            try:
                del self._data['check_idx']
            except __HOLE__: 
                pass            
        else:
            self._data['check_idx'] = 1
            
        return self
dataset/ETHPy150Open smsapi/smsapi-python-client/smsapi/actions/message.py/ApiSendAction.set_check_idx