code: func NewRouteMap() *routeMap {
  	rm := &routeMap{
  		routes: make(map[string]map[string]*Leaf),
  	}
  	for m := range _HTTP_METHODS {
  		rm.routes[m] = make(map[string]*Leaf)
  	}
  	return rm
  }
docs: // NewRouteMap initializes and returns a new routeMap.