private File createDirectory(File parentDirectory, String name) {
    File file = new File(parentDirectory, name);
    assertThat(file.mkdir()).isTrue();
    return file;
  }
Regression test for TRAC #41770: ConcurrentRegionOperationsJUnitTest fails with duplicate
create in an oplog
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegionJUnitTest.java