How to use the telethon.tl.types.PeerChannel function in Telethon

with link_chats(channel, (chat,), bot_group):
        await client.send_message(bot_group, "/update_info")
        title = (await helper.wait_for_event(in_chats(bot_group) & new_title)).new_title
        if alias:
            assert chat.alias in title
        else:
            assert chat.name in title

        if avatar:
            await helper.wait_for_event(in_chats(bot_group) & new_photo)

        if chat_type == "GroupChat":
            # Get group description
            bot_group_t, peer_type = resolve_id(bot_group)
            if peer_type == PeerChannel:
                group: ChatFull = await client(GetFullChannelRequest(bot_group_t))
            else:
                group: ChatFull = await client(GetFullChatRequest(bot_group_t))
            desc = group.full_chat.about

            chats_found = sum(int(
                (i.name in desc) and  # Original name is found, and
                (i.alias is None or i.alias in desc)  # alias is found too if available
            ) for i in chat.members)

            assert len(chat.members) >= 5
            assert chats_found >= 5, f"At least 5 members shall be found in the description: {desc}"

if self.fwd_from:
            self._forward = Forward(self._client, self.fwd_from, entities)

        if self.action:
            if isinstance(self.action, (types.MessageActionChatAddUser,
                                        types.MessageActionChatCreate)):
                self._action_entities = [entities.get(i)
                                         for i in self.action.users]
            elif isinstance(self.action, types.MessageActionChatDeleteUser):
                self._action_entities = [entities.get(self.action.user_id)]
            elif isinstance(self.action, types.MessageActionChatJoinedByLink):
                self._action_entities = [entities.get(self.action.inviter_id)]
            elif isinstance(self.action, types.MessageActionChatMigrateTo):
                self._action_entities = [entities.get(utils.get_peer_id(
                    types.PeerChannel(self.action.channel_id)))]
            elif isinstance(
                    self.action, types.MessageActionChannelMigrateFrom):
                self._action_entities = [entities.get(utils.get_peer_id(
                    types.PeerChat(self.action.chat_id)))]

def _set_client(self, client):
            if isinstance(self._chat_peer, int):
                try:
                    chat = client._entity_cache[self._chat_peer]
                    if isinstance(chat, types.InputPeerChat):
                        self._chat_peer = types.PeerChat(self._chat_peer)
                    elif isinstance(chat, types.InputPeerChannel):
                        self._chat_peer = types.PeerChannel(self._chat_peer)
                    else:
                        # Should not happen
                        self._chat_peer = types.PeerUser(self._chat_peer)
                except KeyError:
                    # Hope for the best. We don't know where this event
                    # occurred but it was most likely in a channel.
                    self._chat_peer = types.PeerChannel(self._chat_peer)

            super()._set_client(client)
            self._sender, self._input_sender = utils._get_entity_pair(
                self.sender_id, self._entities, client._entity_cache)

def build(cls, update, others=None, self_id=None):
        if isinstance(update, types.UpdateChannelPinnedMessage) and update.id == 0:
            # Telegram does not always send
            # UpdateChannelPinnedMessage for new pins
            # but always for unpin, with update.id = 0
            return cls.Event(types.PeerChannel(update.channel_id),
                             unpin=True)

        elif isinstance(update, types.UpdateChatParticipantAdd):
            return cls.Event(types.PeerChat(update.chat_id),
                             added_by=update.inviter_id or True,
                             users=update.user_id)

        elif isinstance(update, types.UpdateChatParticipantDelete):
            return cls.Event(types.PeerChat(update.chat_id),
                             kicked_by=True,
                             users=update.user_id)

        elif isinstance(update, types.UpdateChannel):
            # We rely on the fact that update._entities is set by _process_update
            # This update only has the channel ID, and Telegram *should* have sent
            # the entity in the Updates.chats list. If it did, check Channel.left

types.TopPeer, types.Dialog, types.DialogPeer)):
            return peer.peer
        elif isinstance(peer, types.ChannelFull):
            return types.PeerChannel(peer.id)

        if peer.SUBCLASS_OF_ID in (0x7d7c6f86, 0xd9c7fc18):
            # ChatParticipant, ChannelParticipant
            return types.PeerUser(peer.user_id)

        peer = get_input_peer(peer, allow_self=False, check_hash=False)
        if isinstance(peer, (types.InputPeerUser, types.InputPeerUserFromMessage)):
            return types.PeerUser(peer.user_id)
        elif isinstance(peer, types.InputPeerChat):
            return types.PeerChat(peer.chat_id)
        elif isinstance(peer, (types.InputPeerChannel, types.InputPeerChannelFromMessage)):
            return types.PeerChannel(peer.channel_id)
    except (AttributeError, TypeError):
        pass
    _raise_cast_fail(peer, 'Peer')

if chats is None:
        return None

    if not utils.is_list_like(chats):
        chats = (chats,)

    result = set()
    for chat in chats:
        if isinstance(chat, int):
            if chat < 0:
                result.add(chat)  # Explicitly marked IDs are negative
            else:
                result.update({  # Support all valid types of peers
                    utils.get_peer_id(types.PeerUser(chat)),
                    utils.get_peer_id(types.PeerChat(chat)),
                    utils.get_peer_id(types.PeerChannel(chat)),
                })
        elif isinstance(chat, TLObject) and chat.SUBCLASS_OF_ID == 0x2d45687:
            # 0x2d45687 == crc32(b'Peer')
            result.add(utils.get_peer_id(chat))
        else:
            chat = await client.get_input_entity(chat)
            if isinstance(chat, types.InputPeerSelf):
                chat = await client.get_me(input_peer=True)
            result.add(utils.get_peer_id(chat))

    return result

def build(cls, update, others=None, self_id=None):
        if isinstance(update, types.UpdateReadHistoryInbox):
            return cls.Event(update.peer, update.max_id, False)
        elif isinstance(update, types.UpdateReadHistoryOutbox):
            return cls.Event(update.peer, update.max_id, True)
        elif isinstance(update, types.UpdateReadChannelInbox):
            return cls.Event(types.PeerChannel(update.channel_id),
                             update.max_id, False)
        elif isinstance(update, types.UpdateReadChannelOutbox):
            return cls.Event(types.PeerChannel(update.channel_id),
                             update.max_id, True)
        elif isinstance(update, types.UpdateReadMessagesContents):
            return cls.Event(message_ids=update.messages,
                             contents=True)
        elif isinstance(update, types.UpdateChannelReadMessagesContents):
            return cls.Event(types.PeerChannel(update.channel_id),
                             message_ids=update.messages,
                             contents=True)

def _set_client(self, client):
            if isinstance(self._chat_peer, int):
                try:
                    chat = client._entity_cache[self._chat_peer]
                    if isinstance(chat, types.InputPeerChat):
                        self._chat_peer = types.PeerChat(self._chat_peer)
                    elif isinstance(chat, types.InputPeerChannel):
                        self._chat_peer = types.PeerChannel(self._chat_peer)
                    else:
                        # Should not happen
                        self._chat_peer = types.PeerUser(self._chat_peer)
                except KeyError:
                    # Hope for the best. We don't know where this event
                    # occurred but it was most likely in a channel.
                    self._chat_peer = types.PeerChannel(self._chat_peer)

            super()._set_client(client)
            self._sender, self._input_sender = utils._get_entity_pair(
                self.sender_id, self._entities, client._entity_cache)

def build(cls, update, others=None, self_id=None):
        if isinstance(update, types.UpdateChannelPinnedMessage) and update.id == 0:
            # Telegram does not always send
            # UpdateChannelPinnedMessage for new pins
            # but always for unpin, with update.id = 0
            return cls.Event(types.PeerChannel(update.channel_id),
                             unpin=True)

        elif isinstance(update, types.UpdateChatParticipantAdd):
            return cls.Event(types.PeerChat(update.chat_id),
                             added_by=update.inviter_id or True,
                             users=update.user_id)

        elif isinstance(update, types.UpdateChatParticipantDelete):
            return cls.Event(types.PeerChat(update.chat_id),
                             kicked_by=True,
                             users=update.user_id)

        elif (isinstance(update, (
                types.UpdateNewMessage, types.UpdateNewChannelMessage))
              and isinstance(update.message, types.MessageService)):
            msg = update.message