如何通过遍历gremlin-scala中的图来构建带有属性的类？

import gremlin.scala._

// 定义一个类来表示图中的节点
case class Node(id: Long, name: String, age: Int)

// 创建一个空的图
val graph = EmptyGraph.instance

// 添加节点和边到图中
val v1 = graph + Node(1, "Alice", 25)
val v2 = graph + Node(2, "Bob", 30)
val v3 = graph + Node(3, "Charlie", 35)
val e1 = v1.addEdge("knows", v2, "friend")
val e2 = v2.addEdge("knows", v3, "friend")

// 遍历图中的节点，并构建带有属性的类
val nodesWithProperties = graph.V.toList.map { vertex =>
  val id = vertex.value.id
  val name = vertex.value.name
  val age = vertex.value.age
  Node(id, name, age)
}

// 打印结果
nodesWithProperties.foreach(println)