func (mx *Mux) HandleFunc(pattern string, handlerFn http.HandlerFunc) {
	mx.handle(mALL, pattern, handlerFn)
}
func (mx *Mux) HandleFunc(pattern string, handlerFn http.HandlerFunc) {
	mx.handle(mALL, pattern, handlerFn)
}
func ( mx * Mux ) HandleFunc ( pattern string , handlerFn http . HandlerFunc ) { mx . handle ( mALL , pattern , handlerFn ) }
// HandleFunc adds the route `pattern` that matches any http method to
// execute the `handlerFn` http.HandlerFunc.
HandleFunc adds the route pattern that matches any http method to execute the handlerFn http . HandlerFunc .