for module_id, mmd in variant.arch_mmds[arch].items():

              # Create copy of architecture specific mmd to filter out packages

              # which are not part of this particular repo.

              repo_mmd.set_arch(tree_arch_to_yum_arch(arch))

              artifacts = repo_mmd.get_rpm_artifacts()

          for mmd in variant.mmds:

              mmd_id = "%s-%s" % (mmd.get_name(), mmd.get_stream())

              if mmd_id not in variant.arch_mmds[arch]:

                  variant.arch_mmds[arch][mmd_id] = arch_mmd

          # Contains per-module RPMs added to variant.