oci/layout/oci_transport.go
func LoadManifestDescriptor(imgRef types.ImageReference) (imgspecv1.Descriptor, error) {
	ociRef, ok := imgRef.(ociReference)
	if !ok {
		return imgspecv1.Descriptor{}, errors.Errorf("error typecasting, need type ociRef")
	}
	return ociRef.getManifestDescriptor()
}
func LoadManifestDescriptor(imgRef types.ImageReference) (imgspecv1.Descriptor, error) {
	ociRef, ok := imgRef.(ociReference)
	if !ok {
		return imgspecv1.Descriptor{}, errors.Errorf("error typecasting, need type ociRef")
	}
	return ociRef.getManifestDescriptor()
}
// LoadManifestDescriptor loads the manifest descriptor to be used to retrieve the image name
// when pulling an image