test

var OptSortMaterial = cmpopts.SortSlices(func(i, j slsa.ProvenanceMaterial) bool {
	if i.URI == j.URI {
		i_DigestValue := ""
		for _, v := range i.Digest {
			i_DigestValue = v
		}
		j_DigestValue := ""
		for _, v := range j.Digest {
			j_DigestValue = v
		}
		return i_DigestValue < j_DigestValue
	}
	return i.URI < j.URI
})