public static MountPOptions mountDefaults(AlluxioConfiguration conf) {
    return MountPOptions.newBuilder()
        .setCommonOptions(commonDefaults(conf))
        .setReadOnly(false)
        .setShared(false)
        .build();
  }
@Test
  public void mountOptionsDefaults() {
    MountPOptions options = FileSystemOptionsUtils.mountDefaults(mConf);
    assertNotNull(options);
    assertFalse(options.getShared());
    assertFalse(options.getReadOnly());
    assertEquals(0, options.getPropertiesMap().size());
  }