@Test
  public void recordFirstVersionShouldSetFirstBit() {
    RegionVersionHolder h = createHolder(true);
    h.recordVersion(1);
    assertEquals(1, h.getBitSetVersionForTesting());
    assertEquals(bitSet(0), h.getBitSetForTesting());
    assertContains(h, 1);
    assertHasExceptions(h);
  }
Tests of how the RegionVersionHolder maintains it's bitset under updates
geode-core/src/test/java/org/apache/geode/internal/cache/versions/RegionVersionHolderBitSetJUnitTest.java