@Override
    public Class[] getSupportedClasses() {
      // illegal for a customer to return null but we can do it since we never register
      // this serializer.
      return null;
    }
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