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: consumer_channel_example.go
    path of file: ./repos/confluent-kafka-go/examples/legacy/consumer_channel_example
    
    the code of the file until where you have to start completion: /**
 * Copyright 2016 Confluent Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Example channel-based high-level Apache Kafka consumer
package main

import (
	"fmt"
	"os"
	"os/signal"
	"syscall"

	"github.com/confluentinc/confluent-kafka-go/v2/kafka"
)

func main() {

	if len(os.Args) < 4 {
		fmt.Fprintf(os.Stderr, "Usage: %s <bootstrap-servers> <group> <topics..>\n",
			os.Args[0])
		os.Exit(1)
	}

	bootstrapServers := os.Args[1]
	group := os.Args[2]
	topics := os.Args[3:]

	sigchan := make(chan os.Signal, 1)
	signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)

	c, err := kafka.NewConsumer(&kafka.ConfigMap{
		"bootstrap.servers":               bootstrapServers,
		"group.id":                        group,
		"session.timeout.ms":              6000,
		"go.events.channel.enable":        true,
		"go.application.rebalance.enable": true,
		// Enable generation of PartitionEOF when the
		// e
    
func main() {

	if len(os.Args) < 4 {
		fmt.Fprintf(os.Stderr, "Usage: %s <bootstrap-servers> <group> <topics..>\n",
			os.Args[0])
		os.Exit(1)
	}

	bootstrapServers := os.Args[1]
	group := os.Args[2]
	topics := os.Args[3:]

	sigchan := make(chan os.Signal, 1)
	signal.Notify(sigchan, syscall.SIGINT, syscall.SIGTERM)

	c, err := kafka.NewConsumer(&kafka.ConfigMap{
		"bootstrap.servers":               bootstrapServers,
		"group.id":                        group,
		"session.timeout.ms":              6000,
		"go.events.channel.enable":        true,
		"go.application.rebalance.enable": true,
		// Enable generation of PartitionEOF when the
		// end of a partition is reached.
		"enable.partition.eof": true,
		"auto.offset.reset":    "earliest"})

	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to create consumer: %s\n", err)
		os.Exit(1)
	}

	fmt.Printf("Created Consumer %v\n", c)

	err = c.SubscribeTopics(topics, nil)

	run := true

	for run == true {
		select {
		case sig := <-sigchan:
			fmt.Printf("Caught signal %v: terminating\n", sig)
			run = false

		case ev := <-c.Events():
			switch e := ev.(type) {
			case kafka.AssignedPartitions:
				fmt.Fprintf(os.Stderr, "%% %v\n", e)
				c.Assign(e.Partitions)
			case kafka.RevokedPartitions:
				fmt.Fprintf(os.Stderr, "%% %v\n", e)
				c.Unassign()
			case *kafka.Message:
				fmt.Printf("%% Message on %s:\n%s\n",
					e.TopicPartition, string(e.Value))
			case kafka.PartitionEOF:
				fmt.Printf("%% Reached %v\n", e)
			case kafka.Error:
				// Errors should generally be considered as informational, the client will try to automatically recover
				fmt.Fprintf(os.Stderr, "%% Error: %v\n", e)
			}
		}
	}

	fmt.Printf("Closing consumer\n")
	c.Close()
}