"Serialization" does not display data in sub-sub item

"Serialization" does not display data in sub-sub item

```

Sub Home

**I NEED THIS INFO**

```
```
"children": [
[
{
"sub": "Sub home" **But do not show it**
}
]
]

```

My code

```

1. 
   Home
   
   
   


2. 
   More
   
   
   
   1. Sub Home
   
   
   
   
   1. Sub Home
   **I NEED THIS INFO**

   
   
   
   


3. Third

```
Only display

```
[
[
{
"a_append": "",
"a_prepend": "",
"a_attributes": "",
"a_url": "/",
"a_name": "Home",
"li_append": "",
"li_prepend": "",
"li_attributes": "",
"children": [
[]
]
},
{
"a_append": "",
"a_prepend": "",
"a_attributes": "class=\"dropdown-toggle\" data-toggle=\"dropdown\"",
"a_url": "/",
"a_name": "More",
"li_append": "",
"li_prepend": "",
"li_attributes": "class=\"dropdown\"",
"children": [
[
{
"sub": "Sub home" **But do not show it**
}
]
]
},
{
"id": 2
}
]
]
```