code: function _deleteAtPath(treeData, path) {
          var objectPath = _filePathToObjectPath(treeData, path);
  
          if (!objectPath) {
              return;
          }
  
          var originalName = _.last(objectPath);
  
          // Back up to the parent directory
          objectPath.pop();
  
          treeData = treeData.updateIn(objectPath, function (directory) {
              directory = directory.delete(originalName);
              return directory;
          });
  
          return treeData;
      }
docs: @private
  
  See FileTreeViewModel.deleteAtPath