a.ts

function genStructuredValue(name: string, parent: hl.IHighLevelNode, pr: hl.IProperty) : string | hlimpl.StructuredValue {
	if (pr.range() instanceof defs.ReferenceType){
		var t=<defs.ReferenceType>pr.range();

		var mockNode=jsyaml.createNode(name);
		
		return new hlimpl.StructuredValue(mockNode, parent, pr);
		// var hn = stv.toHighlevel()
		// return hn;
	} else return name;
}

var value = this.genStructuredValue(v, node, typeProperty);
var typeNode = (<any>value) instanceof hlimpl.StructuredValue ? (<hlimpl.StructuredValue>value).toHighlevel() : null;

typeNode.attr("objectType").setValue("blablabla");
node.attr("type").setValue(value);