public List<MaterialRevision> addDependencyRevisionModification(
     List<MaterialRevision> materialRevisions,
     DependencyMaterial dependencyMaterial,
     Pipeline... upstreams) {
   String stageName = CaseInsensitiveString.str(dependencyMaterial.getStageName());
   String label = upstreams[0].getLabel();
   List<Modification> modifications = new ArrayList<Modification>();
   for (Pipeline upstream : upstreams) {
     modifications.add(
         new Modification(
             new Date(),
             DependencyMaterialRevision.create(
                     CaseInsensitiveString.str(dependencyMaterial.getPipelineName()),
                     upstream.getCounter(),
                     label,
                     stageName,
                     upstream.findStage(stageName).getCounter())
                 .getRevision(),
             label,
             upstream.getId()));
   }
   MaterialRevision depRev =
       addRevisionsWithModifications(
           dependencyMaterial, modifications.toArray(new Modification[0]));
   materialRevisions.add(depRev);
   return Arrays.asList(depRev);
 }