function getChildNodeByName(node, name)
        {
            for (var iter = node.edges(); iter.hasNext(); iter.next()) {
                var child = iter.edge.node();
                if (child.name() === name)
                    return child;
            }
            return null;
        }
@param {!WebInspector.HeapSnapshotNode} node
@param {string} name
@return {?WebInspector.HeapSnapshotNode}