code: public static TieredIdentity fromProto(alluxio.grpc.TieredIdentity tieredPIdentity) {
      return new TieredIdentity(tieredPIdentity.getTiersList().stream().map(GrpcUtils::fromProto)
          .collect(Collectors.toList()));
    }
docs: Converts a proto type to a wire type.
  
  @param tieredPIdentity the proto type to convert
  @return the converted wire type