@Override
  public long getMs(PropertyKey key) {
    checkArgument(key.getType() == PropertyKey.PropertyType.DURATION);
    return FormatUtils.parseTimeSize((String) get(key));
  }
@Test
  public void alias() throws Exception {
    try (Closeable p =
        new SystemPropertyRule("alluxio.master.worker.timeout.ms", "100").toResource()) {
      resetConf();
      assertEquals(100, mConfiguration.getMs(PropertyKey.MASTER_WORKER_TIMEOUT_MS));
    }
  }