code: def get_default_config(self):
          
          config = super(LibratoHandler, self).get_default_config()
  
          config.update({
              'user': '',
              'apikey': '',
              'apply_metric_prefix': False,
              'queue_max_size': 300,
              'queue_max_interval': 60,
              'include_filters': ['^.*'],
          })
  
          return config
docs: Return the default config for the handler