echart树状图中的json是什么

https://gallery.pyecharts.org/#/Tree/tree_left_right
这个flare.json的结构是多层字典吗？

import json

from pyecharts import options as opts
from pyecharts.charts import Tree


with open("flare.json", "r", encoding="utf-8") as f:
    j = json.load(f)
c = (
    Tree()
    .add("", [j], collapse_interval=2)
    .set_global_opts(title_opts=opts.TitleOpts(title="Tree-左右方向"))
    .render("tree_left_right.html")
)

大概这样的形式

{
            "children": [
                {"name": "B"},
                {
                    "children": [
                        {"children": [{"name": "I"}], "name": "E"},
                        {"name": "F"},
                    ],
                    "name": "C",
                },
                {
                    "children": [
                        {"children": [{"name": "J"}, {"name": "K"}], "name": "G"},
                        {"name": "H"},
                    ],
                    "name": "D",
                },
            ],
            "name": "A",
        }