code: function findInWorkingSet(fullPath) {
          DeprecationWarning.deprecationWarning("Use MainViewManager.findInWorkingSet() instead of DocumentManager.findInWorkingSet()", true);
          return MainViewManager.findInWorkingSet(MainViewManager.ACTIVE_PANE, fullPath);
      }
docs: Returns the index of the file matching fullPath in the working set.
  @deprecated Use MainViewManager.findInWorkingSet() instead
  @param {!string} fullPath
  @return {number} index, -1 if not found