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: newfs.go
    path of file: ./repos/rclone/fs
    
    the code of the file until where you have to start completion: // NewFs and its helpers

package fs

import (
	"context"
	"crypto/md5"
	"encoding/base64"
	"os"
	"path/filepath"
	"strings"
	"sync"

	"github.com/rclone/rclone/fs/config/configmap"
	"github.com/rclone/rclone/fs/fspath"
)

// Store the hashes of the overridden config
var (
	overriddenConfigMu sync.Mutex
	overriddenConfig   = make(map[string]string)
)

// NewFs makes a new Fs object from the path
//
// The path is of the form remote:path
//
// Remotes are looked up in the config file.  If the remote isn't
// found then NotFoundInConfigFile will be returned.
//
// On Windows avoid single character remote names as they can be mixed
// up with drive letters.
func NewFs(ctx context.Context, path string) (Fs, error) {
	Debugf(nil, "Creating backend with remote %q", path)
	if ConfigFileHasSection(path) {
		Logf(nil, "%q refers to a local folder, use %q to refer to your remote or %q to hide this warning", path, path+":", "./"+path)
	}
	fsInfo, configName, fsPath, config, err := ConfigFs(path)
	if err != nil {
		return nil, err
	}
	overridden := fsInfo.Options.Overridden(config)
	if len(overridden) > 0 {
		extraConfig := overridden.String()
		//Debugf(nil, "detected overridden config %q", extraConfig)
		md5sumBinary := md5.Sum([]byte(extraConfig))
		configHash := base64.RawURLEncoding.EncodeToString(md5sumBinary[:])
		// 5 characters length is 5*6 = 30 bits of base64
		overriddenCo
    
func NewFs(ctx context.Context, path string) (Fs, error) {
	Debugf(nil, "Creating backend with remote %q", path)
	if ConfigFileHasSection(path) {
		Logf(nil, "%q refers to a local folder, use %q to refer to your remote or %q to hide this warning", path, path+":", "./"+path)
	}
	fsInfo, configName, fsPath, config, err := ConfigFs(path)
	if err != nil {
		return nil, err
	}
	overridden := fsInfo.Options.Overridden(config)
	if len(overridden) > 0 {
		extraConfig := overridden.String()
		//Debugf(nil, "detected overridden config %q", extraConfig)
		md5sumBinary := md5.Sum([]byte(extraConfig))
		configHash := base64.RawURLEncoding.EncodeToString(md5sumBinary[:])
		// 5 characters length is 5*6 = 30 bits of base64
		overriddenConfigMu.Lock()
		var suffix string
		for maxLength := 5; ; maxLength++ {
			suffix = "{" + configHash[:maxLength] + "}"
			existingExtraConfig, ok := overriddenConfig[suffix]
			if !ok || existingExtraConfig == extraConfig {
				break
			}
		}
		Debugf(configName, "detected overridden config - adding %q suffix to name", suffix)
		// Add the suffix to the config name
		//
		// These need to work as filesystem names as the VFS cache will use them
		configName += suffix
		// Store the config suffixes for reversing in ConfigString
		overriddenConfig[suffix] = extraConfig
		overriddenConfigMu.Unlock()
	}
	f, err := fsInfo.NewFs(ctx, configName, fsPath, config)
	if f != nil && (err == nil || err == ErrorIsFile) {
		addReverse(f, fsInfo)
	}
	return f, err
}