code: def package_filter(config, message, package=None, *args, **kw):
      
  
      package = kw.get('package', package)
      if package:
          return package in fmn.rules.utils.msg2packages(message, **config)
docs: A particular package
  
      Use this rule to include messages that relate to a certain package
      (*i.e., nethack*).