private void createAndPut() {
    try {
      region.create(1, 1);
    } catch (Exception e) {
      logWriter.error("Exception occurred", e);
      throw new AssertionError(" failed in trying to create", e);
    }
    region.put(1, 2);
  }
do a create and then a put on the same key
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/ConflationJUnitTest.java