code: function(el, doc) {
              return Y.Dom._inDoc(Y.Dom.get(el), doc);
          }
docs: Determines whether an HTMLElement is present in the current document.
  @method inDocument
  @param {String | HTMLElement} el The element to search for
  @param {Object} doc An optional document to search, defaults to element's owner document
  @return {Boolean} Whether or not the element is present in the current document