copyMinor

import mir.ndslice;
//  0  1  2  3
//  4  5  6  7
//  8  9 10 11
auto a = iota!int(3, 4);
auto b = slice!int(2, 2);
copyMinor(a, b, [2, 1].sliced, [0, 3].sliced);
assert(b == [[8, 11], [4, 7]]);