old_contents: """
  The internal machinery to load the toolbar items.
  """
  import inspect
  import traceback
  import sys
  from django.core.exceptions import ImproperlyConfigured
  from staff_toolbar import appsettings
  from staff_toolbar.items import RootNode, Group
  
  try:
      from importlib import import_module
  except ImportError:
      from django.utils.importlib import import_module  # Python 2.6 compatibility
  
  _toolbar_root = None
  
  
  __all__ = (
      'get_toolbar_root',
      'load_toolbar_item'
  )
  
  
  def get_toolbar_root():
      """
      Init on demand.
      :rtype RootNode:
      """
      global _toolbar_root
      if _toolbar_root is None:
          items = [load_toolbar_item(item) for item in appsettings.STAFF_TOOLBAR_ITEMS]
          _toolbar_root = RootNode(*items)
      return _toolbar_root
  
  
  def load_toolbar_item(import_path, *args, **kwargs):
      """
      Load an item in the toolbar
      :param import_path: the dotted python path to class or function.
      :param args: For classes, any arguments to pass to the constructor.
      :param kwargs: For classes, any keyword arguments to pass to the constructor.
      """
      if isinstance(import_path, (tuple, list)):
          return Group(*import_path)
  
      symbol = _import_symbol(import_path, 'STAFF_TOOLBAR_ITEMS')
      if inspect.isclass(symbol):
          symbol = symbol(*args, **kwargs)
      elif not callable(symbol):
          raise ImproperlyConfigured("The {0} in {1} is not callable!".format(import_path, 'STAFF_TOOLBAR_ITEMS'))
  
      return symbol
  
  
  def _import_symbol(import_path, setting_name):
      """
      Import a class or function by name.
      """
      mod_name, class_name = import_path.rsplit('.', 1)
  
      # import module
      try:
          mod = import_module(mod_name)
          cls = getattr(mod, class_name)
      except ImportError, e:
          __, __, exc_traceback = sys.exc_info()
          frames = traceback.extract_tb(exc_traceback)
          if len(frames) > 1:
              raise   # import error is a level deeper.
  
          raise ImproperlyConfigured("{0} does not point to an existing class: {1}".format(setting_name, import_path))
      except AttributeError:
          raise ImproperlyConfigured("{0} does not point to an existing class: {1}".format(setting_name, import_path))
  
      return cls
  
new_contents: """
  The internal machinery to load the toolbar items.
  """
  import inspect
  import traceback
  import sys
  from django.core.exceptions import ImproperlyConfigured
  from staff_toolbar import appsettings
  from staff_toolbar.items import RootNode, Group
  
  try:
      from importlib import import_module
  except ImportError:
      from django.utils.importlib import import_module  # Python 2.6 compatibility
  
  _toolbar_root = None
  
  
  __all__ = (
      'get_toolbar_root',
      'load_toolbar_item'
  )
  
  
  def get_toolbar_root():
      """
      Init on demand.
      :rtype RootNode:
      """
      global _toolbar_root
      if _toolbar_root is None:
          items = [load_toolbar_item(item) for item in appsettings.STAFF_TOOLBAR_ITEMS]
          _toolbar_root = RootNode(*items)
      return _toolbar_root
  
  
  def load_toolbar_item(import_path, *args, **kwargs):
      """
      Load an item in the toolbar
      :param import_path: the dotted python path to class or function.
      :param args: For classes, any arguments to pass to the constructor.
      :param kwargs: For classes, any keyword arguments to pass to the constructor.
      """
      if isinstance(import_path, (tuple, list)):
          children = [load_toolbar_item(path) for path in import_path]
          return Group(*children)
      elif isinstance(import_path, basestring):
          symbol = _import_symbol(import_path, 'STAFF_TOOLBAR_ITEMS')
      else:
          symbol = import_path
  
      if inspect.isclass(symbol):
          # Instantiate the class.
          symbol = symbol(*args, **kwargs)
  
      if not callable(symbol):
          raise ImproperlyConfigured("The {0} in {1} is not callable!".format(import_path, 'STAFF_TOOLBAR_ITEMS'))
  
      return symbol
  
  
  def _import_symbol(import_path, setting_name):
      """
      Import a class or function by name.
      """
      mod_name, class_name = import_path.rsplit('.', 1)
  
      # import module
      try:
          mod = import_module(mod_name)
          cls = getattr(mod, class_name)
      except ImportError, e:
          __, __, exc_traceback = sys.exc_info()
          frames = traceback.extract_tb(exc_traceback)
          if len(frames) > 1:
              raise   # import error is a level deeper.
  
          raise ImproperlyConfigured("{0} does not point to an existing class: {1}".format(setting_name, import_path))
      except AttributeError:
          raise ImproperlyConfigured("{0} does not point to an existing class: {1}".format(setting_name, import_path))
  
      return cls
  
subject: Fix using Group in the appsettings