text: """
  Item pipeline
  
  See documentation in docs/item-pipeline.rst
  """
  
  from scrapy.middleware import MiddlewareManager
  from scrapy.utils.conf import build_component_list
  
  class ItemPipelineManager(MiddlewareManager):
  
      component_name = 'item pipeline'
  
      @classmethod
      def _get_mwlist_from_settings(cls, settings):
          return build_component_list(settings.getwithbase('ITEM_PIPELINES'))
  
      def _add_middleware(self, pipe):
          super(ItemPipelineManager, self)._add_middleware(pipe)
          if hasattr(pipe, 'process_item'):
              self.methods['process_item'].append(pipe.process_item)
  
      def process_item(self, item, spider):
          return self._process_chain('process_item', item, spider)
  