The callback for field deserializers see this example doesn't need to be passed the current object.

Effectively this

{"aboutMe", (o,n) => { (o as User).AboutMe = n.GetStringValue(); } },

Can be changed to that

{"aboutMe", (n) => { this.AboutMe = n.GetStringValue(); } },

And the parent method return type can be simplified.

This will contribute to making the generated code smaller as well as the byte code, which has been a challenge for Go and TypeScript.