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: getter.go
    path of file: ./repos/athens/pkg/storage/s3
    
    the code of the file until where you have to start completion: package s3

import (
	"context"
	"fmt"
	"io"

	"github.com/aws/aws-sdk-go/aws"
	"github.com/aws/aws-sdk-go/aws/awserr"
	"github.com/aws/aws-sdk-go/service/s3"
	"github.com/gomods/athens/pkg/config"
	"github.com/gomods/athens/pkg/errors"
	"github.com/gomods/athens/pkg/observ"
	"github.com/gomods/athens/pkg/storage"
)

// Info implements the (./pkg/storage).Getter interface.
func (s *Storage) Info(ctx context.Context, module, version string) ([]byte, error) {
	const op errors.Op = "s3.Info"
	ctx, span := observ.StartSpan(ctx, op.String())
	defer span.End()

	infoReader, err := s.open(ctx, config.PackageVersionedName(module, version, "info"
    
func (s *Storage) GoMod(ctx context.Context, module, version string) ([]byte, error) {
	const op errors.Op = "s3.GoMod"
	ctx, span := observ.StartSpan(ctx, op.String())
	defer span.End()

	modReader, err := s.open(ctx, config.PackageVersionedName(module, version, "mod"))
	if err != nil {
		var aerr awserr.Error
		if errors.AsErr(err, &aerr) && aerr.Code() == s3.ErrCodeNoSuchKey {
			return nil, errors.E(op, errors.M(module), errors.V(version), errors.KindNotFound)
		}
		return nil, errors.E(op, err, errors.M(module), errors.V(version))
	}
	defer func() { _ = modReader.Close() }()

	modBytes, err := io.ReadAll(modReader)
	if err != nil {
		return nil, errors.E(op, fmt.Errorf("could not get new reader for mod file: %w", err), errors.M(module), errors.V(version))
	}

	return modBytes, nil
}