private static bool IsManifestDigestMissing([NotNull] this Implementation implementation)
{
return implementation.ManifestDigest == default(ManifestDigest) ||
// Empty strings are used in 0template to indicate that the user wishes this value to be calculated
implementation.ManifestDigest.Sha1New == "" ||
implementation.ManifestDigest.Sha256 == "" ||
implementation.ManifestDigest.Sha256New == "";
}