console.log(`chunk component upsert children has ${this.children.size()} children`);
    // .clone() is SLOW!!! for now, let's not track children to delete
    // let childrenToDelete = new KeyedHashMap<PointNodeRef, PointNodeComponent>();

    // console.log(`chunk component upsert children has ${this.children.size()} children`);

    console.log(`chunk component to delete has ${childrenToDelete.size()} children`);

    // console.log(`chunk component to delete has ${childrenToDelete.size()} children`);