code: func NewManager(routers map[string]*config.Router,
  	serviceManager *service.Manager, middlewaresBuilder *middleware.Builder, modifierBuilder *responsemodifiers.Builder,
  ) *Manager {
  	return &Manager{
  		routerHandlers:     make(map[string]http.Handler),
  		configs:            routers,
  		serviceManager:     serviceManager,
  		middlewaresBuilder: middlewaresBuilder,
  		modifierBuilder:    modifierBuilder,
  	}
  }
docs: // NewManager Creates a new Manager