Genric type list support to map to child type JSON mapping

I could not figure out if TypeConverter could support such a use case and hence I am raising an issue. Consider the following situation:

```
@JsonObject
class A{
@JsonField
String aa;
}
@JsonObject
class B extends A{
@JsonField
String bb;

}
@JsonObject
class C extends A{
@JsonField
String cc;
}
```

I want to parse my incoming JSON array into `List` but while fetching them I would like to type cast them as the child classes of `B` and `C` and use `cInstance.getCc()` .Is this possible?

No source file, test, or entry point is named; begin by tracing TypeConverter and the existing @JsonObject/@JsonField mapping path. A complete change would need an agreed mechanism for selecting B or C while reading List, plus tests showing both child mappings and access to their fields.

Written by the indexing model from the issue text.