code: function(selector, root, firstOnly) {
          var result = Y.Selector._query(selector, root, firstOnly);
          YAHOO.log('query: returning ' + result, 'info', 'Selector');
          return result;
      }
docs: Retrieves a set of nodes based on a given CSS selector.
  @method query
  
  @param {string} selector The CSS Selector to test the node against.
  @param {HTMLElement | String} root optional An id or HTMLElement to start the query from. Defaults to Selector.document.
  @param {Boolean} firstOnly optional Whether or not to return only the first match.
  @return {Array} An array of nodes that match the given selector.
  @static