pkg/archive/archive_other.go - third_party/github.com/moby/moby - Git at Google

 // +build !linux

 package archive

 func getWhiteoutConverter(format WhiteoutFormat) tarWhiteoutConverter {
 	return nil
 }
	// +build !linux

	package archive

	func getWhiteoutConverter(format WhiteoutFormat) tarWhiteoutConverter {
	return nil
	}