code: public static <T extends Comparable<T>> int compare(Collection<T> collection1, Collection<T> collection2, ComparisonStyle style) {
          if (style != ComparisonStyle.LEXICOGRAPHIC) {
              int diff = collection1.size() - collection2.size();
              if (diff != 0) {
                  return (diff < 0) == (style == ComparisonStyle.SHORTER_FIRST) ? -1 : 1;
              }
          }
          return compare(collection1, collection2);
      }
docs: Utility to compare two collections, optionally by size, and then lexicographically.
  @hide unsupported on Android