Function precacheFiberNode

lib/assets/react-source/development/react.js:11514–11516

(hostInst, node)

	var internalEventHandlersKey = '__reactEventHandlers$' + randomKey;
	var internalContainerInstanceKey = '__reactContainere$' + randomKey;
	function precacheFiberNode(hostInst, node) {
	  node[internalInstanceKey] = hostInst;
	}
	function markContainerAsRoot(hostRoot, node) {
	  node[internalContainerInstanceKey] = hostRoot;
	}