@Test
  public void recordVersionLessThanBitSetWidthShouldNotMoveBitSet() {
    RegionVersionHolder h = createHolder(true);
    int version = BIT_SET_WIDTH - 10;
    h.recordVersion(version);
    assertEquals(1, h.getBitSetVersionForTesting());
    assertEquals(bitSet(version - 1), h.getBitSetForTesting());
    assertContains(h, version);
    assertHasExceptions(h, RVVException.createException(0, version));
  }
Tests of how the RegionVersionHolder maintains it's bitset under updates
geode-core/src/test/java/org/apache/geode/internal/cache/versions/RegionVersionHolderBitSetJUnitTest.java