code: func (i *ImageService) DistributionServices() DistributionServices {
  	return DistributionServices{
  		DownloadManager:   i.downloadManager,
  		V2MetadataService: metadata.NewV2MetadataService(i.distributionMetadataStore),
  		LayerStore:        i.layerStores[runtime.GOOS],
  		ImageStore:        i.imageStore,
  		ReferenceStore:    i.referenceStore,
  	}
  }
docs: // DistributionServices return services controlling daemon image storage