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: cinder.go
    path of file: ./repos/juju/provider/openstack
    
    the code of the file until where you have to start completion: // Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.

package openstack

import (
	"fmt"
	"math"
	"net/url"
	"sync"
	"time"

	"github.com/go-goose/goose/v5/cinder"
	gooseerrors "github.com/go-goose/goose/v5/errors"
	"github.com/go-goose/goose/v5/identity"
	"github.com/go-goose/goose/v5/nova"
	"github.com/juju/collections/set"
	"gith
    
func (s *cinderVolumeSource) DescribeVolumes(ctx context.ProviderCallContext, volumeIds []string) ([]storage.DescribeVolumesResult, error) {
	// In most cases, it is quicker to get all volumes and loop
	// locally than to make several round-trips to the provider.
	cinderVolumes, err := s.storageAdapter.GetVolumesDetail()
	if err != nil {
		handleCredentialError(err, ctx)
		return nil, errors.Trace(err)
	}
	volumesById := make(map[string]*cinder.Volume)
	for i, volume := range cinderVolumes {
		volumesById[volume.ID] = &cinderVolumes[i]
	}
	results := make([]storage.DescribeVolumesResult, len(volumeIds))
	for i, volumeId := range volumeIds {
		cinderVolume, ok := volumesById[volumeId]
		if !ok {
			results[i].Error = errors.NotFoundf("volume %q", volumeId)
			continue
		}
		info := cinderToJujuVolumeInfo(cinderVolume)
		results[i].VolumeInfo = &info
	}
	return results, nil
}