pkg/adt/interval_tree.go
func (ivt *IntervalTree) Stab(iv Interval) (ivs []*IntervalValue) {
	if ivt.count == 0 {
		return nil
	}
	f := func(n *IntervalValue) bool { ivs = append(ivs, n); return true }
	ivt.Visit(iv, f)
	return ivs
}
func (ivt *IntervalTree) Stab(iv Interval) (ivs []*IntervalValue) {
	if ivt.count == 0 {
		return nil
	}
	f := func(n *IntervalValue) bool { ivs = append(ivs, n); return true }
	ivt.Visit(iv, f)
	return ivs
}
// Stab returns a slice with all elements in the tree intersecting the interval.