Calculate local index from global index for integer input

        :param index: global index as integer
        :param axis: current axis to process
        :return:

def int_global_to_local(self, index, axis=0):
        """ Calculate local index from global index for integer input

        :param index: global index as integer
        :param axis: current axis to process
        :return:
        """

        # Warum >= an dieser Stelle. Eigentlich sollte > ausreichend sein! Test!
        if index >= self.__mask[axis].stop-self.__halos[1][axis]:
            return None

        if index < self.__mask[axis].start+self.__halos[0][axis]:
            return None

        return index-self.__mask[axis].start