code: func WrapFactoryWithoutTags(f FactoryWithoutTags, options Options) metrics.Factory {
  	return WrapFactoryWithTags(
  		&tagless{
  			Options: defaultOptions(options),
  			factory: f,
  		},
  		options,
  	)
  }
docs: // WrapFactoryWithoutTags creates a real metrics.Factory that supports subscopes.