private void resetFlags() {
    toDataCalled = false;
    toDataPre11Called = false;
    toDataPre15called = false;
    fromDataCalled = false;
    fromDataPre11Called = false;
    fromDataPre15Called = false;
  }
Test if all messages implement toDataPreXXX and fromDataPreXXX if the message has been upgraded
in any of the versions
geode-core/src/distributedTest/java/org/apache/geode/internal/BackwardCompatibilitySerializationDUnitTest.java