code: def setup_logging():
      
      global console_handler
  
      # make sure logging is setup only once
      if console_handler:
          return
  
      # set the handler of the law root logger
      console_handler = logging.StreamHandler()
      console_handler.setFormatter(LogFormatter())
      logging.getLogger("law").addHandler(console_handler)
  
      # set levels for all loggers
      for name, level in Config.instance().items("logging"):
          level = level.upper()
          if hasattr(logging, level):
              logger = logging.getLogger(name)
              logger.setLevel(getattr(logging, level))
              logger.debug("registered logger with level '{}'".format(level))
docs: Sets up the internal logging mechanism, i.e., it creates the :py:attr:`console_handler`, sets
      its formatting, and mounts on on the main ``"law"`` logger. It also sets the levels of all
      loggers that are given in the law config.