[
  {
    "key": null,
    "code": "code_3_1",
    "name": "l_name3_1",
    "child": [
      {
        "key": "code_3_1",
        "code": "code_2_1",
        "name": "l_name2_1",
        "child": [
          {
            "key": "code_2_1",
            "code": "code_l_1",
            "name": "l_name1_1",
            "child": [
              {
                "key": "code_l_1",
                "code": "code_forcast_level_1",
                "name": "forcast_level_1",
                "child": {

                }
              }
            ]
          }
        ]
      }
    ]
  },
  {
    "key": null,
    "code": "code_3_2",
    "name": "l_name3_2",
    "child": [
      {
        "key": "code_3_2",
        "code": "code_2_2",
        "name": "l_name2_2",
        "child": [
          {
            "key": "code_2_2",
            "code": "code_l_2",
            "name": "l_name1_2",
            "child": [
              {
                "key": "code_l_2",
                "code": "code_forcast_level_2",
                "name": "forcast_level_2",
                "child": {

                }
              }
            ]
          }
        ]
      }
    ]
  },
  {
    "key": null,
    "code": "code_3_3",
    "name": "l_name3_3",
    "child": [
      {
        "key": "code_3_3",
        "code": "code_2_3",
        "name": "l_name2_3",
        "child": [
          {
            "key": "code_2_3",
            "code": "code_l_3",
            "name": "l_name1_3",
            "child": [
              {
                "key": "code_l_3",
                "code": "code_forcast_level_3",
                "name": "forcast_level_3",
                "child": {

                }
              }
            ]
          }
        ]
      }
    ]
  }
]