old_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  from django.conf import settings
  from django.core.exceptions import ImproperlyConfigured
  from django.utils.importlib import import_module
  
  
  for module in getattr(settings, 'CMSPLUGIN_CASCADE_PLUGINS'):
      try:
          # if a module was specified, load all plugins in module settings
          module_settings = import_module('{0}.settings'.format(module))
          module_plugins = getattr(module_settings, 'CASCADE_PLUGINS', [])
          for p in module_plugins:
              try:
                  import_module('{0}.{1}'.format(module, p))
              except ImportError:
                  raise ImproperlyConfigured("Plugin {0} as specified in {1}.settings.CMSPLUGIN_CASCADE_PLUGINS could not be loaded".format(p, module))
      except ImportError:
          try:
              # otherwise try with cms_plugins in the named module
              import_module('{0}.cms_plugins'.format(module))
          except ImportError:
              # otherwise just use the named module as plugin
              import_module('{0}'.format(module))
  
new_contents: # -*- coding: utf-8 -*-
  from __future__ import unicode_literals
  from django.conf import settings
  from django.core.exceptions import ImproperlyConfigured
  from django.utils.importlib import import_module
  
  
  for module in getattr(settings, 'CMSPLUGIN_CASCADE_PLUGINS', []):
      try:
          # if a module was specified, load all plugins in module settings
          module_settings = import_module('{0}.settings'.format(module))
          module_plugins = getattr(module_settings, 'CASCADE_PLUGINS', [])
          for p in module_plugins:
              try:
                  import_module('{0}.{1}'.format(module, p))
              except ImportError:
                  raise ImproperlyConfigured("Plugin {0} as specified in {1}.settings.CMSPLUGIN_CASCADE_PLUGINS could not be loaded".format(p, module))
      except ImportError:
          try:
              # otherwise try with cms_plugins in the named module
              import_module('{0}.cms_plugins'.format(module))
          except ImportError:
              # otherwise just use the named module as plugin
              import_module('{0}'.format(module))
  
subject: allow empty setting for CMSPLUGIN_CASCADE_PLUGINS