docs: static int lengthOfTrailingPartialSubList(final List<?> source, final List<?> target) {
          final int s = source.size() - 1;
          final int t = target.size() - 1;
          int l = 0;
  
          while (l <= s && l <= t && source.get(s - l).equals(target.get(t - l))) {
              l++;
          }
  
          return l;
      }