code: function(node) {
          var uid = (node.nodeType !== 9) ? node.uniqueID : node[UID];
  
          if (uid && Y_Node._instances[uid] && Y_Node._instances[uid]._node !== node) {
              node[UID] = null; // unset existing uid to prevent collision (via clone or hack)
          }
  
          uid = uid || Y.stamp(node);
          if (!uid) { // stamp failed; likely IE non-HTMLElement
              uid = Y.guid();
          }
  
          this[UID] = uid;
  
          /**
           * The underlying DOM node bound to the Y.Node instance
           * @property _node
           * @private
           */
          this._node = node;
          Y_Node._instances[uid] = this;
  
          this._stateProxy = node; // when augmented with Attribute
  
          Y.EventTarget.call(this, {emitFacade:true});
  
          if (this._initPlugins) { // when augmented with Plugin.Host
              this._initPlugins();
          }
      }
docs: The Node class provides a wrapper for manipulating DOM Nodes.
  Node properties can be accessed via the set/get methods.
  Use Y.get() to retrieve Node instances.
  
  <strong>NOTE:</strong> Node properties are accessed using
  the <code>set</code> and <code>get</code> methods.
  
  @class Node
  @constructor
  @param {DOMNode} node the DOM node to be mapped to the Node instance.
  @for Node
   "globals"