code: @NotNull
      public ComparatorCompat<T> thenComparing(@NotNull final Comparator<? super T> other) {
          return new ComparatorCompat<T>(thenComparing(comparator, other));
      }
docs: Adds the given comparator to the chain.
  
  @param other  the other comparator to be used when chained
  comparator compares two objects that are equal
  @return the new {@code ComparatorCompat} instance