private static SERIALIZATION_VERSION calculateSerializationVersion() {
    if (serializationVersionTxt == null || serializationVersionTxt.isEmpty()) {
      return latestVersion;
    } else if (serializationVersionTxt.startsWith("6.6.0")
        || serializationVersionTxt.startsWith("6.6.1")) {
      return SERIALIZATION_VERSION.v660;
    } else if (serializationVersionTxt.startsWith("6.6.2")) {
      return SERIALIZATION_VERSION.v662;
    } else {
      return SERIALIZATION_VERSION.vINVALID;
    }
  }
Initializes the optional serialization "accept list" if the user has requested it in the
DistributionConfig

@param config the DistributedSystem configuration
@param services SanctionedSerializablesService that might have classes to acceptlist
geode-core/src/main/java/org/apache/geode/internal/InternalDataSerializer.java