code: function getNextPrevFile(inc) {
          DeprecationWarning.deprecationWarning("Use MainViewManager.traverseToNextViewByMRU() instead of DocumentManager.getNextPrevFile()", true);
          var result = MainViewManager.traverseToNextViewByMRU(inc);
          if (result) {
              return result.file;
          }
          return null;
      }
docs: Get the next or previous file in the working set, in MRU order (relative to currentDocument). May
  return currentDocument itself if working set is length 1.
  @deprecated use MainViewManager.traverseToNextViewByMRU() instead