text: from attr import attrs, attrib
  
  from aioalice.types import AliceObject
  
  
  @attrs
  class BaseSession(AliceObject):
      """Base Session object"""
      session_id = attrib(type=str)
      message_id = attrib(type=int)
      user_id = attrib(type=str)
  
  
  @attrs
  class Session(BaseSession):
      """Session object"""
      new = attrib(type=bool)
      skill_id = attrib(type=str)
  
      @property
      def base(self):
          return BaseSession(
              self.session_id,
              self.message_id,
              self.user_id,
          )
  