func newImageSource(tmpDir string, ref ostreeReference) (types.ImageSource, error) {
	return &ostreeImageSource{ref: ref, tmpDir: tmpDir, compressed: nil}, nil
}
func newImageSource(tmpDir string, ref ostreeReference) (types.ImageSource, error) {
	return &ostreeImageSource{ref: ref, tmpDir: tmpDir, compressed: nil}, nil
}
func newImageSource ( tmpDir string , ref ostreeReference ) ( types . ImageSource , error ) { return & ostreeImageSource { ref : ref , tmpDir : tmpDir , compressed : nil } , nil }
// newImageSource returns an ImageSource for reading from an existing directory.
newImageSource returns an ImageSource for reading from an existing directory .