class_docstr: Output channel that collects send messages in a list.
  
  (doesn't send them anywhere, just collects them).
docstr: Name of the channel.
docstr_tok: ["Name","of","the","channel","."]
code: def name(cls) -> Text:
      """Name of the channel."""
      return "collector"
  
imports: import json
  import logging
  import uuid
  import jwt
  from sanic import Sanic, Blueprint
  from sanic.request import Request
  from typing import Text, List, Dict, Any, Optional, Callable, Iterable, Awaitable, NoReturn
  from rasa.cli import utils
  from rasa.shared.constants import DOCS_BASE_URL, DEFAULT_SENDER_ID
  from rasa.core.constants import BEARER_TOKEN_PREFIX
  from rasa.shared.exceptions import RasaException
label_desc: Use image node_id 2 for calling the CollectingOutputChannel obj's underlying member method code with example usage: obj.name(cls) and returns: str