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.go
    path of file: ./repos/go-coffeeshop/pkg/rabbitmq/consumer
    
    the code of the file until where you have to start completion: package consumer

import (
	"context"

	"github.com/
    
func (c *consumer) StartConsumer(fn worker) error {
	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	ch, err := c.createChannel()
	if err != nil {
		return errors.Wrap(err, "CreateChannel")
	}
	defer ch.Close()

	deliveries, err := ch.Consume(
		c.queueName,
		c.consumerTag,
		_consumeAutoAck,
		_consumeExclusive,
		_consumeNoLocal,
		_consumeNoWait,
		nil,
	)
	if err != nil {
		return errors.Wrap(err, "Consume")
	}

	forever := make(chan bool)

	for i := 0; i < c.workerPoolSize; i++ {
		go fn(ctx, deliveries)
	}

	chanErr := <-ch.NotifyClose(make(chan *amqp.Error))
	slog.Error("ch.NotifyClose", chanErr)
	<-forever

	return chanErr
}