@Override
  public String toString() {
    return toString(false);
  }
@Test
  public void testToStringNoQuota() {
    QuotaUsage quotaUsage = new QuotaUsage.Builder().
        fileAndDirectoryCount(1234).build();
    String expected = "        none             inf            none"
        + "             inf ";
    assertEquals(expected, quotaUsage.toString());
  }