text: from arclet.letoderea.entities.auxiliary import BaseAuxiliary
  from typing import Type
  from ..event import EdovesBasicEvent
  
  
  class EventFilter(BaseAuxiliary):
      """用以对传入的事件进行预处理, 比如限定medium内容"""
      target_event: Type[EdovesBasicEvent]
      pass
  