@Test
  public void testReplaceWithOverflow() {
    region.put("1", "1");
    region.put("2", "2");
    assertEquals(true, region.replace("1", "1", "one"));
  }
Test the replace method with an entry that has overflowed to disk.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/ReplaceWithOverflowJUnitTest.java