AlexanderWingard

import scala.collection.Map

class PitTree[+T](val children : Map[String, PitTree[T]], val value : Option[T]) extends Map[String, T] {
  def this() = this(Map(), None)
  def this(value : T) = this(Map(), Some(value))
  
  def update[T1 >: T](path : String, upVal : T1) : PitTree[T1] = this.+(path -> upVal)
  
  override def empty = new PitTree[T]