public static Integer createServerCache(Boolean flag) throws Exception {
    ConnectionTable.threadWantsSharedResources();
    return createServerCache(flag, DataPolicy.DEFAULT, Scope.DISTRIBUTED_ACK, false);
  }
Simulates old value null, entry null
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/DeltaPropagationStatsDUnitTest.java