@Override
  public String getRegionAttributesId() {
    // This property will be null if it hasn't been set in the context.xml file.
    // Since its default is dependent on the session cache, get the default from
    // the session cache.
    if (regionAttributesId == null) {
      regionAttributesId = getSessionCache().getDefaultRegionAttributesId();
    }
    return regionAttributesId;
  }
@deprecated No replacement. Always prefer deserialized form.
extensions/geode-modules/src/main/java/org/apache/geode/modules/session/catalina/DeltaSessionManager.java