data.json

[
  {
    "id": "1",
    "name": "Office Map"
  },
  {
    "id": "2",
    "name": "New Employee Onboarding",
    "children": [
      {
        "id": "8",
        "name": "Onboarding Materials"
      },
      {
        "id": "9",
        "name": "Training"
      }
    ]
  },
  {
    "id": "3",
    "name": "Office Events",
    "children": [
      {
        "id": "6",
        "name": "2018",
        "children": [
          {
            "id": "10",
            "name": "Summer Picnic"
          },
          {
            "id": "11",
            "name": "Valentine's Day Party"
          },
          {
            "id": "12",
            "name": "New Year's Party"
          }
        ]
      },
      {
        "id": "7",
        "name": "2017",
        "children": [
          {
            "id": "13",
            "name": "Company Anniversary Celebration"
          }
        ]
      }
    ]
  },
  {
    "id": "4",
    "name": "Public Holidays"
  },
  {
    "id": "5",
    "name": "Vacations and Sick Leaves"
  }
]