context.go
func (x *Context) RoutePattern() string {
	routePattern := strings.Join(x.RoutePatterns, "")
	return strings.Replace(routePattern, "/*/", "/", -1)
}
func (x *Context) RoutePattern() string {
	routePattern := strings.Join(x.RoutePatterns, "")
	return strings.Replace(routePattern, "/*/", "/", -1)
}
// RoutePattern builds the routing pattern string for the particular
// request, at the particular point during routing. This means, the value
// will change throughout the execution of a request in a router. That is
// why its advised to only use this value after calling the next handler.
//
// For example,
//
//   func Instrument(next http.Handler) http.Handler {
//     return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
//       next.ServeHTTP(w, r)
//       routePattern := chi.RouteContext(r.Context()).RoutePattern()
//       measure(w, r, routePattern)
//   	 })
//   }