Automatically adding inheritance as properties on constructor, javascript

Question

I'm moving a (heavy) file-parser to a webworker. Webworkers can only return serialized json. Hence, I cant return function that gives me object that inherit from a specific class:

getCollection: function getCollection(cls) {
  if (!cls) {
    return this.myObjects;
  }
  let collection = cls.toUpperCase();

  let arr = [];

  for (let i = 0; i < this.nrOfObjects; i++) {
    if(classes[collection]){
      if (this.myObjects[i] instanceof classes[collection]) {
        arr.push(this.myObjects[i]);
      }
    }
  }

  return arr;
}

So for example getCollection('product') would return all instances that inherits from the class product

When I move the parsers to the webworker, I can't return this function. Is there anyway I can add the inheritance to my constructor in my classes instead?

export class Column extends BuildingElment {
  constructor(GlobalId, OwnerHistory, Name, Description) {
    super(GlobalId, OwnerHistory, Name);
    this.description = Description
    this.nameOfClass = 'Column';
    this.inheritance = ['Root', 'Product', 'BuildingElement'] // Can this be somehow automatically generated??
  }
}

Or if there is any other way I can work with webworkers and still get the inheritance.