code: function() {
              var $this = $(this);
              $this.find('.treegrid-indent').remove();
              var tpl = $this.treegrid('getSetting', 'indentTemplate');
              var expander = $this.find('.treegrid-expander');
              var depth = $this.treegrid('getDepth');
              for (var i = 0; i < depth; i++) {
                  $(tpl).insertBefore(expander);
              }
              return $this;
          }
docs: Initialize indent for node
  
  @returns {Node}