0');
    collection.idWasCreated(
        scopedId, 'tr.e.cc', 'Frame', 10);
    collection.idWasDeleted(
        scopedId, 'tr.e.cc', 'Frame', 15);
    collection.idWasCreated(
        scopedId, 'skia', 'Picture', 20);
    collection.idWasDeleted(
        scopedId, 'skia', 'Picture', 25);

    const frame = collection.getObjectInstanceAt(scopedId, 10);
    assert.strictEqual(frame.category, 'tr.e.cc');
    assert.strictEqual(frame.name, 'Frame');

    const picture = collection.getObjectInstanceAt(scopedId