code: function _swapWorkingSetListIndexes(paneId, index1, index2) {
          var pane = _getPane(paneId);
  
          pane.swapViewListIndexes(index1, index2);
          exports.trigger("workingSetSort", pane.id);
          exports.trigger("_workingSetDisableAutoSort", pane.id);
      }
docs: Mutually exchanges the files at the indexes passed by parameters.
  @param {!string} paneId - id of the pane to swap indices or ACTIVE_PANE
  @param {!number} index1 - the index on the left
  @param {!number} index2 - the index on the rigth
  @private