{
  "tool": "A",
  "version": "1.3",
  "dependencies": [
    {
      "tool": "B",
      "version": "8.23",
      "dependencies": []
    },
    {
      "tool": "C",
      "version": "2.1",
      "dependencies": [
        {
          "tool": "D",
          "version": "1.1",
          "dependencies": []
        }
      ]
    }
  ]
}

##</code><code>##

  A
 / \
 B C
   |
   D

##</code><code>##

B/8.23
D/1.1
C/2.1
A/1.3