docstr: Class has already been created ... register
docstr_tok: ["Class","has","already","been","created","...","register"]
code: def __init__(cls, name, bases, dct):
      """Class has already been created ... register"""
      # Initialize the class
      super(MetaVCBroker, cls).__init__(name, bases, dct)
      vcstore.VCStore.BrokerCls = cls
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import collections
  from datetime import date, datetime, timedelta
  import threading
  from backtrader import BrokerBase, Order, BuyOrder, SellOrder
  from backtrader.comminfo import CommInfoBase
  from backtrader.feed import DataBase
  from backtrader.metabase import MetaParams
  from backtrader.position import Position
  from backtrader.utils.py3 import with_metaclass
  from backtrader.stores import vcstore
label_desc: Use image node_id 1 to create a new MetaVCBroker object from inherited base classes: BrokerBase with example: obj = MetaVCBroker(cls, name, bases, dct)