private DiskRegionProperties getDiskRegionProperties() {
    DiskRegionProperties diskProperties = new DiskRegionProperties();
    diskProperties.setRegionName("DiskRegCbkChkJUnitTest_region");
    diskProperties.setMaxOplogSize(20480);
    diskProperties.setDiskDirs(dirs);
    return diskProperties;
  }
Tests if callbacks are getting invoked correctly for 'create', 'update' and 'destroy' of disk
region entries with concurrent 'clear'
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegCbkChkJUnitTest.java