function selectLastSelectedNode(nodeId)
        {
            if (this.selectedDOMNode()) {
                // Focused node has been explicitly set while reaching out for the last selected node.
                return;
            }
            var node = nodeId ? domModel.nodeForId(nodeId) : null;
            selectNode.call(this, node);
        }
@param {?DOMAgent.NodeId} nodeId
@this {WebInspector.ElementsPanel}