old_contents: from .common import EventBuilder, EventCommon, name_inner_event
  from ..tl import types
  
  
  @name_inner_event
  class MessageDeleted(EventBuilder):
      """
      Event fired when one or more messages are deleted.
      """
      def build(self, update):
          if isinstance(update, types.UpdateDeleteMessages):
              event = MessageDeleted.Event(
                  deleted_ids=update.messages,
                  peer=None
              )
          elif isinstance(update, types.UpdateDeleteChannelMessages):
              event = MessageDeleted.Event(
                  deleted_ids=update.messages,
                  peer=types.PeerChannel(update.channel_id)
              )
          else:
              return
  
          event._entities = update._entities
          return self._filter_event(event)
  
      class Event(EventCommon):
          def __init__(self, deleted_ids, peer):
              super().__init__(
                  chat_peer=peer, msg_id=(deleted_ids or [0])[0]
              )
              self.deleted_id = None if not deleted_ids else deleted_ids[0]
              self.deleted_ids = deleted_ids
  
new_contents: from .common import EventBuilder, EventCommon, name_inner_event
  from ..tl import types
  
  
  @name_inner_event
  class MessageDeleted(EventBuilder):
      """
      Event fired when one or more messages are deleted.
      """
      def build(self, update):
          if isinstance(update, types.UpdateDeleteMessages):
              event = MessageDeleted.Event(
                  deleted_ids=update.messages,
                  peer=None
              )
          elif isinstance(update, types.UpdateDeleteChannelMessages):
              event = MessageDeleted.Event(
                  deleted_ids=update.messages,
                  peer=types.PeerChannel(update.channel_id)
              )
          else:
              return
  
          event._entities = update._entities
          return self._filter_event(event)
  
      class Event(EventCommon):
          def __init__(self, deleted_ids, peer):
              super().__init__(
                  chat_peer=peer, msg_id=(deleted_ids or [0])[0]
              )
              if peer is None:
                  # If it's not a channel ID, then it was private/small group.
                  # We can't know which one was exactly unless we logged all
                  # messages, but we can indicate that it was maybe either of
                  # both by setting them both to True.
                  self.is_private = self.is_group = True
  
              self.deleted_id = None if not deleted_ids else deleted_ids[0]
              self.deleted_ids = deleted_ids
  
subject: Set is private/group=True for messages deleted out of channels