auto slice = ndiota(2, 3);
static immutable array =
    [[[0, 0], [0, 1], [0, 2]],
     [[1, 0], [1, 1], [1, 2]]];

assert(slice == array);

auto im = ndiota(7, 9);

assert(im[2, 1] == [2, 1]);

//slicing works correctly
auto cm = im[1 .. $, 4 .. $];
assert(cm[2, 1] == [3, 5]);