code: def start():
      
      pool = gevent.threadpool.ThreadPool(len(ENTRYPOINTS))
      for entrypoint, callback, args, kwargs in ENTRYPOINTS:
          cname = callback.__name__
          #1. Retrieve the class which owns the callback
          for name, klass in inspect.getmembers(sys.modules[callback.__module__], inspect.isclass):
              if hasattr(klass, cname):
                  service_name = name.lower()
                  break
          #2.Start the entrypoint
          callback = getattr(klass(), cname)
          kwargs.update({'service':service_name, 'callback':callback, 'callback_name': cname})
          LOGGER.info('Start service %s[%s].', service_name.capitalize(), cname)
          obj = entrypoint(*args, **kwargs)
          pool.spawn(obj.start, *args, **kwargs)
      pool.join()
      return True
docs: | Start all the registered entrypoints
      | that have been added to `ENTRYPOINTS`.
  
      :rtype: None