code: public Optional<Range<T>> intersect(T t1, T t2) {
          return intersect(new Range<>(t1, t2));
      }
docs: The intersection of two ranges.
  <p>
  <code><pre>
  // (2, 3)
  range(1, 3).intersect(2, 4)
  
  // none
  range(1, 3).intersect(5, 8)
  </pre></code>