ref

type Finder interface {

	// Find returns the lowest common ancestor between a and b.
	// If a or b is root, the lowest common ancestor is root.
	// If one of a or b is an ancestor of another, the lowest common ancestor is the next their ancestor.
	// So, only root might be an ancestor of itself.
	Find(a, b Key) *Key
}

type Key string

type Node struct {
	Key      Key    `json:"name"`
	Subnodes []Node `json:"employees"`
}

type Tarjan struct {
	// contains filtered or unexported fields
}