魔果云课开放平台接口文档上线啦！
res.PathTreeRes
{
"child": [
{
"child": [],
"id": 0,
"material_name": "string"
}
],
"id": 0,
"material_name": "string"
}
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{
"child": [
{
"child": [],
"id": 0,
"material_name": "string"
}
],
"id": 0,
"material_name": "string"
}