docs: def get_plugins(cls):
          """
          Returns all plugin instances of plugin point, passing all args and
          kwargs to plugin constructor.
          """
          # Django >= 1.9 changed something with the migration logic causing
          # plugins to be executed before the corresponding database tables
          # exist. This method will only return something if the database
          # tables have already been created.
          # XXX: I don't fully understand the issue and there should be
          # another way but this appears to work fine.
          if django_version >= (1, 9) and \
                  not db_table_exists(Plugin._meta.db_table):
              raise StopIteration
  
          if is_plugin_point(cls):
              for plugin_model in cls.get_plugins_qs():
                  yield plugin_model.get_plugin()
          else:
              raise Exception(_('This method is only available to plugin point '
                                'classes.'))