def next_free_pos(self, address):
        """
        Returns the next free position with respect to an address, including that address itself

        :param address: The address to begin the search with (including itself)
        :return: The next free position
        """

        idx = self._search(address)
        if idx < len(self._list) and self._list[idx].start <= address < self._list[idx].end:
            # Occupied
            i = idx
            while i + 1 < len(self._list) and self._list[i].end == self._list[i + 1].start:
                i += 1
            if i == len(self._list):
                return self._list[-1].end

            return self._list[i].end

        return address