Turns the given entity into a valid Telegram :tl:`User`, :tl:`Chat`
        or :tl:`Channel`. You can also pass a list or iterable of entities,
        and they will be efficiently fetched from the network.

        entity (`str` | `int` | :tl:`Peer` | :tl:`InputPeer`):
            If a username is given, **the username will be resolved** making
            an API call every time. Resolving usernames is an expensive
            operation and will start hitting flood waits around 50 usernames
            in a short period of time.

            If you want to get the entity for a *cached* username, you should
            first `get_input_entity(username) <get_input_entity>` which will
            use the cache), and then use `get_entity` with the result of the
            previous call.

            Similar limits apply to invite links, and you should use their
            ID instead.

            Using phone numbers (from people in your contact list), exact
            names, integer IDs or :tl:`Peer` rely on a `get_input_entity`
            first, which in turn needs the entity to be in cache, unless
            a :tl:`InputPeer` was passed.

            Unsupported types will raise ``TypeError``.

            If the entity can't be found, ``ValueError`` will be raised.

        Returns:
            :tl:`User`, :tl:`Chat` or :tl:`Channel` corresponding to the
            input entity. A list will be returned if more than one was given.

async def get_entity(self, entity):
        """
        Turns the given entity into a valid Telegram :tl:`User`, :tl:`Chat`
        or :tl:`Channel`. You can also pass a list or iterable of entities,
        and they will be efficiently fetched from the network.

        entity (`str` | `int` | :tl:`Peer` | :tl:`InputPeer`):
            If a username is given, **the username will be resolved** making
            an API call every time. Resolving usernames is an expensive
            operation and will start hitting flood waits around 50 usernames
            in a short period of time.

            If you want to get the entity for a *cached* username, you should
            first `get_input_entity(username) <get_input_entity>` which will
            use the cache), and then use `get_entity` with the result of the
            previous call.

            Similar limits apply to invite links, and you should use their
            ID instead.

            Using phone numbers (from people in your contact list), exact
            names, integer IDs or :tl:`Peer` rely on a `get_input_entity`
            first, which in turn needs the entity to be in cache, unless
            a :tl:`InputPeer` was passed.

            Unsupported types will raise ``TypeError``.

            If the entity can't be found, ``ValueError`` will be raised.

        Returns:
            :tl:`User`, :tl:`Chat` or :tl:`Channel` corresponding to the
            input entity. A list will be returned if more than one was given.
        """
        single = not utils.is_list_like(entity)
        if single:
            entity = (entity,)

        # Group input entities by string (resolve username),
        # input users (get users), input chat (get chats) and
        # input channels (get channels) to get the most entities
        # in the less amount of calls possible.
        inputs = []
        for x in entity:
            if isinstance(x, str):
                inputs.append(x)
            else:
                inputs.append(await self.get_input_entity(x))

        users = [x for x in inputs
                 if isinstance(x, (types.InputPeerUser, types.InputPeerSelf))]
        chats = [x.chat_id for x in inputs
                 if isinstance(x, types.InputPeerChat)]
        channels = [x for x in inputs
                    if isinstance(x, types.InputPeerChannel)]
        if users:
            # GetUsersRequest has a limit of 200 per call
            tmp = []
            while users:
                curr, users = users[:200], users[200:]
                tmp.extend(await self(functions.users.GetUsersRequest(curr)))
            users = tmp
        if chats:  # TODO Handle chats slice?
            chats = (await self(
                functions.messages.GetChatsRequest(chats))).chats
        if channels:
            channels = (await self(
                functions.channels.GetChannelsRequest(channels))).chats

        # Merge users, chats and channels into a single dictionary
        id_entity = {
            utils.get_peer_id(x): x
            for x in itertools.chain(users, chats, channels)
        }

        # We could check saved usernames and put them into the users,
        # chats and channels list from before. While this would reduce
        # the amount of ResolveUsername calls, it would fail to catch
        # username changes.
        result = []
        for x in inputs:
            if isinstance(x, str):
                result.append(await self._get_entity_from_string(x))
            elif not isinstance(x, types.InputPeerSelf):
                result.append(id_entity[utils.get_peer_id(x)])
            else:
                result.append(next(
                    u for u in id_entity.values()
                    if isinstance(u, types.User) and u.is_self
                ))

        return result[0] if single else result