function didGetClassName(className)
        {
            if (!className) {
                callback(null);
                return;
            }
            var constructorNodes = this.topLevelNodes();
            for (var i = 0; i < constructorNodes.length; i++) {
                var parent = constructorNodes[i];
                if (parent._name === className) {
                    parent.populateNodeBySnapshotObjectId(parseInt(id, 10), didPopulateNode.bind(this));
                    return;
                }
            }
        }
@param {?string} className
@this {WebInspector.HeapSnapshotConstructorsDataGrid}