[
  {
    "input": [
      [
        {
          "type": "folder",
          "name": "cats",
          "children": [
            {
              "type": "image",
              "name": "Buffy"
            },
            {
              "type": "image",
              "name": "Gizmo"
            },
            {
              "type": "folder",
              "name": "small-cat",
              "children": [
                {
                  "type": "image",
                  "name": "Fluffy"
                },
                {
                  "type": "image",
                  "name": "Harry"
                },
                {
                  "type": "folder",
                  "name": "black-cat",
                  "children": [
                    {
                      "type": "image",
                      "name": "Daisy"
                    },
                    {
                      "type": "image",
                      "name": "Toby"
                    }
                  ]
                },
                {
                  "type": "folder",
                  "name": "white-cat",
                  "children": [
                    {
                      "type": "image",
                      "name": "Minnie"
                    },
                    {
                      "type": "image",
                      "name": "Lucy"
                    }
                  ]
                }
              ]
            },
            {
              "type": "folder",
              "name": "future-cat",
              "children": []
            }
          ]
        }
      ]
    ],
    "output": [
      "Buffy",
      "Gizmo",
      "Fluffy",
      "Harry",
      "Daisy",
      "Toby",
      "Minnie",
      "Lucy"
    ]
  }
]