private void verifyUserFileRestored(final File dir, final long expectedLastModified) {
    File dir1 = new File(dir, "test1");
    File dir2 = new File(dir1, "test2");
    File textFile = new File(dir2, "my.txt");

    assertThat(textFile).exists();
    assertThat(textFile.lastModified()).isEqualTo(expectedLastModified);
  }
Test what happens when we restart persistent members while there is an accessor concurrently
performing puts.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/backup/BackupDistributedTest.java