code: function () {
  /*Line 135 - 'AtomFrameView.js' */                var index = this._selectedIndex;
  /*Line 136 - 'AtomFrameView.js' */                if (index) {
  /*Line 137 - 'AtomFrameView.js' */                    var item = Atom.query(this._items).firstOrDefault({ index: index });
  /*Line 138 - 'AtomFrameView.js' */                    if (item) {
  /*Line 139 - 'AtomFrameView.js' */                        var self = this;
  /*Line 140 - 'AtomFrameView.js' */                        index = index - 1;
  /*Line 141 - 'AtomFrameView.js' */                        Atom.set(this, "selectedIndex", index);
  /*Line 142 - 'AtomFrameView.js' */                        if (self._removeOnBack) {
  /*Line 143 - 'AtomFrameView.js' */                            this.replaceItemWithUrl(item, item.opener);
  /*Line 144 - 'AtomFrameView.js' */                        }
  
  /*Line 146 - 'AtomFrameView.js' */                    }
  /*Line 147 - 'AtomFrameView.js' */                }
  /*Line 148 - 'AtomFrameView.js' */            }
docs: /*Line 134 - 'AtomFrameView.js'