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: balance_tester.go
    path of file: ./repos/azure-sdk-for-go/sdk/messaging/azeventhubs/internal/eh/stress/tests
    
    the code of the file until where you have to start completion: // Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

package tests

import (
	"context"
	"encoding/json"
	"errors"
	"flag"
	"fmt"
	golog "log"
	"os"
	"strings"
	"sync"
	"time"

	"github.com/Azure/azure-sdk-for-go/sdk/internal/log"
	"github.com/Azure/azure-sdk-for-go/sdk/messaging/azeventhubs"
	"github.com/Azure/azure-sdk-for-go/sdk/messaging/azeventhubs/checkpoints"
	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob"
	"github.com/Azure/azure-sdk-for-go/sdk/storage/azblob/bloberror"
)

const (
	EventBalanceTest log.Event = "balance.
    
func BalanceTester(ctx context.Context) error {
	fs := flag.NewFlagSet("", flag.ContinueOnError)

	numProcessors := fs.Int("processors", 32, "The # of processor instances to run")
	strategy := fs.String("strategy", string(azeventhubs.ProcessorStrategyBalanced), "The partition acquisition strategy to use (balanced, greedy)")

	if err := fs.Parse(os.Args[2:]); err != nil {
		return err
	}

	log.SetEvents(EventBalanceTest, azeventhubs.EventConsumer)
	log.SetListener(func(e log.Event, s string) {
		// we don't have structured logging in our SDK so this is the most reasonable way to
		// see what partitions each processor
		if e == azeventhubs.EventConsumer &&
			!strings.Contains(s, "Asked for") {
			return
		}

		golog.Printf("[%s] %s", e, s)
	})

	return balanceTesterImpl(ctx, *numProcessors, azeventhubs.ProcessorStrategy(*strategy))
}