You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: jsr311.go
    path of file: ./repos/agones/vendor/github.com/emicklei/go-restful/v3
    
    the code of the file until where you have to start completion: package restful

// Copyright 2013 Ernest Micklei. All rights reserved.
// Use of this source code is governed by a license
// that can be found in the LICENSE file.

import (
	"errors"
	"fmt"
	"net/http"
	"sort"
	"strings"
)

// RouterJSR311 implements the flow for matching Requests to Routes (and consequently Resource Functions)
// as s
    
func (r RouterJSR311) detectDispatcher(requestPath string, dispatchers []*WebService) (*WebService, string, error) {
	filtered := &sortableDispatcherCandidates{}
	for _, each := range dispatchers {
		matches := each.pathExpr.Matcher.FindStringSubmatch(requestPath)
		if matches != nil {
			filtered.candidates = append(filtered.candidates,
				dispatcherCandidate{each, matches[len(matches)-1], len(matches), each.pathExpr.LiteralCount, each.pathExpr.VarCount})
		}
	}
	if len(filtered.candidates) == 0 {
		if trace {
			traceLogger.Printf("no WebService was found to match URL path:%s\n", requestPath)
		}
		return nil, "", errors.New("not found")
	}
	sort.Sort(sort.Reverse(filtered))
	return filtered.candidates[0].dispatcher, filtered.candidates[0].finalMatch, nil
}