log.info("Retrieving plane: " + z + "x" + c + "x" + t);
    public MappedByteBuffer getPlane(Integer z, Integer c, Integer t)        throws IOException, DimensionsOutOfBoundsException    {        Long offset = getPlaneOffset(z, c, t);        Integer size = getPlaneSize();        MappedByteBuffer region = getRegion(size, offset);        byte[] nullPlane = PixelsService.nullPlane;                for (int i = 0; i < PixelsService.NULL_PLANE_SIZE; i++)            if (region.get(i) != nullPlane[i])                return region;                return null;  // All of the nullPlane bytes match, non-filled plane    }