whole_func_string: function splitDataNode(node, index) {
          var newNode = node.cloneNode(false);
          newNode.deleteData(0, index);
          node.deleteData(index, node.length - index);
          insertAfter(newNode, node);
          return newNode;
      }
func_code_string: function splitDataNode(node, index) {
          var newNode = node.cloneNode(false);
          newNode.deleteData(0, index);
          node.deleteData(index, node.length - index);
          insertAfter(newNode, node);
          return newNode;
      }
func_documentation_string: Note that we cannot use splitText() because it is bugridden in IE 9.