How to serialize the name of the property instead of the name of the base class field? #107

{
	"origin": {
		"x": 1,
		"y": 2
	},
	"size": {
		"width": 3,
		"height": 4
	}
}

{
	"origin": {
		"a": 1,
		"b": 2
	},
	"size": {
		"a": 3,
		"b": 4
	}
}

@JsonObject("Pair")
export class Pair2
{
    @JsonProperty("a", Number)
    protected a: number;
    @JsonProperty("b", Number)
    protected b: number;

    constructor(a?: number, b?: number)
    {
        this.a = a;
        this.b = b;
    }
}

@JsonObject("Coord")
export class Coord2 extends Pair2
{
    @JsonProperty("x", Number)
    public get x(): number { return this.a; }
    public set x(value: number) { this.a = value; }

    @JsonProperty("y", Number)
    public get y(): number { return this.b };
    public set y(value: number) { this.b = value };

    constructor(x?: number, y?: number)
    {
        super(x, y);
    }
}

@JsonObject("Size")
export class Size2 extends Pair2
{
    @JsonProperty("width", Number)
    public get width(): number { return this.a; }
    public set width(value: number) { this.a = value; }

    @JsonProperty("height", Number)
    public get height(): number { return this.b };
    public set height(value: number) { this.b = value };

    constructor(width?: number, height?: number)
    {
        super(width, height);
    }
}

@JsonObject("Rectangle")
export class Rectangle2
{
    @JsonProperty("origin", Coord2)
    origin: Coord2;
    @JsonProperty("size", Size2)
    size: Size2;

    constructor(origin: Coord2, size: Size2)
    {
        this.origin = origin;
        this.size = size;
    }
}

let jsonConvert: JsonConvert = new JsonConvert();
jsonConvert.operationMode = OperationMode.LOGGING; // print some debug data
jsonConvert.ignorePrimitiveChecks = false; // don't allow assigning number to string etc.
jsonConvert.valueCheckingMode = ValueCheckingMode.DISALLOW_NULL; // never allow null

let origin = new Coord2(1, 2);
let size = new Size2(3, 4);
let rectangle = new Rectangle2(origin, size);

let rectangleJsonObj = jsonConvert.serialize(rectangle);
console.log(rectangleJsonObj);
let rectangleStr = JSON.stringify(rectangleJsonObj);
console.log(rectangleStr);