code: function notifyPathNameChanged(oldName, newName) {
          // Notify all open documents
          _.forEach(_openDocuments, function (doc) {
              // TODO: Only notify affected documents? For now _notifyFilePathChange
              // just updates the language if the extension changed, so it's fine
              // to call for all open docs.
              doc._notifyFilePathChanged();
          });
  
          // Send a "fileNameChange" event. This will trigger the views to update.
          exports.trigger("fileNameChange", oldName, newName);
      }
docs: Called after a file or folder name has changed. This function is responsible
  for updating underlying model data and notifying all views of the change.
  
  @param {string} oldName The old name of the file/folder
  @param {string} newName The new name of the file/folder