@Override
    public int getId() {
      // illegal for a customer to use but since our WellKnownDS is never registered
      // with this id it gives us one to use
      return 0;
    }
Used to implement serialization code for the well known classes we support in DataSerializer.

@since GemFire 5.7
geode-core/src/main/java/org/apache/geode/internal/InternalDataSerializer.java