Accessing containing ES6 class from mesh hits by extending mesh.

Hi, I can execute local functions fine but when I do a pick on the scene there is not a way to access the objects that are siblings to the mesh like this.isSelected.

Is the best way to solve this to add the parent class as a new property on the mesh, ie doing:

  constructor(scene, isOwn, isSelected = false) {

    this.mesh = BABYLON.Mesh.CreateSphere("sphere1", 8, Common.MEDIUM_UNIT_SIZE, scene);
    this.mesh.parentClass = this;

Then I can access the parentClass from the mesh object. Will this work/is it a good idea?