docs: @Override
  	public float calc(Object o1, Object o2) {
  		if (!o1.getClass().equals(o2.getClass()))
  			throw new IllegalArgumentException("Exception in HybridHammingLoss: o1 and o2 have different types");
  		
  		int[][] l1 = (int[][]) o1;
  		int[][] l2 = (int[][]) o2;
  		int ne = 0;
  		for (int i = 0; i < l1[0].length; i++) {
  			for (int j = 0; j < l1.length; j++) {
  				if (l1[j][i] != l2[j][i]) {
  					ne++;
  					break;
  				}
  			}
  		}
  		return ne;
  	}