@Override
  public void setDeclarativeCacheConfig(final CacheConfig cacheConfig) {
    throw new UnsupportedOperationException("Should not be invoked");
  }
Returns whether PdxInstance is preferred for PDX types instead of Java object.

@see CacheFactory#setPdxReadSerialized(boolean)
@since GemFire 6.6
geode-core/src/main/java/org/apache/geode/internal/cache/xmlcache/CacheCreation.java