gistfile1.txt

    _uiAddChild: function (child, parentNode) {

        // Out of the box, this is never async, so things will always work, even if children are
        // rendered out of order.

        // The plugin modifies this code to be async (by moving the defRenderFn to an async queue).
        // Since it's doing this, I think it's also appropriate for it to override any methods
        // which were written based on the assumption that child.render() was always synchronous.

        child.render(parentNode); 

        // If render() is made async, we can't rely on this being invoked with content in the DOM, so

        var childBB = child.get("boundingBox"),
            siblingBB,
            nextSibling = child.next(false),
            prevSibling;
    
        if (nextSibling) {
            siblingBB = nextSibling.get(BOUNDING_BOX);
            siblingBB.insert(childBB, "before");
        } else {
            prevSibling = child.previous(false);
    
            if (prevSibling) {
                siblingBB = prevSibling.get(BOUNDING_BOX);
                siblingBB.insert(childBB, "after");
            }
        }
    }