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: validator.go
    path of file: ./repos/azure-sdk-for-go/eng/tools/generator/config/validate
    
    the code of the file until where you have to start completion: // Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.

package validate

import (
	"context"
	"errors"
	"fmt"
	"path/filepath"
	"str
    
func ParseTrack2(config *config.Config, specRoot string) (armServices map[string][]common.PackageInfo, errResult error) {
	armServices = make(map[string][]common.PackageInfo)
	for readme, track2Request := range config.Track2Requests {
		for _, request := range track2Request {
			service, err := common.ReadV2ModuleNameToGetNamespace(filepath.Join(specRoot, getReadmeGoFromReadme(readme)))
			if err != nil {
				errResult = errors.Join(errResult, fmt.Errorf("cannot get readme.go.md content: %+v", err))
				continue
			}

			var subService string
			_, after, _ := strings.Cut(request.PackageFlag, "package-")
			s := strings.Split(after, "-")
			if _, err = strconv.Atoi(s[0]); err != nil && s[0] != "preview" {
				subService = s[0]
			}

			for arm, packageInfos := range service {
				if subService == "" && len(packageInfos) > 0 {
					packageInfos[0].RequestLink = request.RequestLink
					packageInfos[0].ReleaseDate = request.TargetDate
					packageInfos[0].Tag = fmt.Sprintf("tag: %s", request.PackageFlag)
					armServices[arm] = append(armServices[arm], packageInfos[0])
				}

				if subService != "" && len(packageInfos) == 1 {
					packageInfos[0].RequestLink = request.RequestLink
					packageInfos[0].ReleaseDate = request.TargetDate
					packageInfos[0].Tag = fmt.Sprintf("tag: %s", request.PackageFlag)
					armServices[arm] = append(armServices[arm], packageInfos[0])
				} else if subService != "" && len(packageInfos) > 1 {
					for _, packageInfo := range packageInfos {
						if strings.Contains(packageInfo.Config, subService) {
							packageInfo.RequestLink = request.RequestLink
							packageInfo.ReleaseDate = request.TargetDate
							packageInfo.Tag = fmt.Sprintf("tag: %s", request.PackageFlag)
							armServices[arm] = append(armServices[arm], packageInfo)
							break
						}
					}
				}
			}
		}
	}

	return armServices, errResult
}