Add AIS_ColoredShape to XCAFDoc_ShapeTool with CustomAspects

Hi, 

I am trying to add AIS_ColoredShape to the XCAFDoc_ShapeTool. Here is my code:

TDF_Label addColoredShape(const Handle_AIS_ColoredShape& coloredShape, const Handle_XCAFDoc_ShapeTool& tool) {
			TopoDS_Shape shape = coloredShape->Shape();

			TDF_Label shapeL;

			TopoDS_Builder builder;
			TopoDS_Compound  comp;
			builder.MakeCompound(comp);
			AIS_DataMapOfShapeDrawer::Iterator aspects(coloredShape->CustomAspectsMap());

			for (aspects.Reset(); aspects.More(); aspects.Next()) {
				builder.Add(comp, aspects.Key());
			}

			shapeL = tool->AddShape(comp, false);

			auto cTool = XCAFDoc_DocumentTool::ColorTool(shapeL);
			for (TopoDS_Iterator itr(comp); itr.More(); itr.Next()) {
				auto sh = itr.Value();
				auto color = coloredShape->CustomAspects(sh)->ShadingAspect()->Color();

				cTool->AddColor(color);

				if (sh.IsEqual(shape)) {
					cTool->SetColor(shapeL, color, XCAFDoc_ColorGen);
					continue;
				}

				TDF_Label L;
				L = tool->AddSubShape(shapeL, sh);

				if (!L.IsNull()) {
					cTool->SetColor(L, color, XCAFDoc_ColorGen);
				}
			}
			return shapeL;
		}

In above code I am able to add the the subshape with custom aspect. (i.e AddSubShape() returns a Non Null TDF_Label). 

After this API I exported TDocStd_Document (for the same ShapeTool) into GLTF. But I can see only one color is exported for coloredShape (I am sure that coloredShape have different colors).

Please suggest me a better way to add colored shape to XCAFDoc_ShapeTool.

Thanks.