code: public ImmutableRangeSet<C> intersection(RangeSet<C> other) {
      RangeSet<C> copy = TreeRangeSet.create(this);
      copy.removeAll(other.complement());
      return copyOf(copy);
    }
docs: Returns a new range set consisting of the intersection of this range set and {@code other}.
  
  <p>This is essentially the same as {@code
  TreeRangeSet.create(this).removeAll(other.complement())} except it returns an {@code
  ImmutableRangeSet}.
  
  @since 21.0