code: function(fn) {
          var ret = null;
          if (fn) {
              ret = (typeof fn === 'string') ?
              function(n) {
                  return Y.Selector.test(n, fn);
              } : 
              function(n) {
                  return fn(Y.one(n));
              };
          }
  
          return ret;
      }
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"