Submit a single item
        :param c_key: The pointer to the key
        :param c_len: The length of the key
        :param value: The value object. May be None
        :param item: The Item. May be None
        :param key_options: Key-specific options (may be None)
        :param global_options: Global options for the command
        :param mres: The MultiResult item. Used to create a cookie
        :return: A status code

def submit_single(self, c_key, c_len, value, item, key_options, global_options, mres):
        """
        Submit a single item
        :param c_key: The pointer to the key
        :param c_len: The length of the key
        :param value: The value object. May be None
        :param item: The Item. May be None
        :param key_options: Key-specific options (may be None)
        :param global_options: Global options for the command
        :param mres: The MultiResult item. Used to create a cookie
        :return: A status code
        """
        raise NotImplementedError()