text: 'use strict';
  
  class Node {
    constructor(value, left = null, right = null) {
      this.value = value;
      this.left = left;
      this.right = right;
    }
  }
  
  class BinaryTree {
  
    constructor(root = null) {
      this.root = root;
    }
  
  }
  
  module.exports = {BinaryTree, Node};
  