return
		}
		sz := d.sizeRecursive(path.Key())
		leaves = append(leaves, struct {
			objects uint64
			path    dataUsageHash
		}{objects: sz.Objects, path: path})
		for ch := range e.Children {
			add(dataUsageHash(ch))
		}
	}

	// Add path recursively.
	add(path)
	sort.Slice(leaves, func(i, j int) bool {
		return leaves[i].objects < leaves[j].objects
	})
	for remove > 0 && len(leaves) > 0 {

        assertNull(ex.getCause(), "Default ctor should not set a cause");
        assertTrue(ex instanceof SmbException, "Should be an SmbException subtype");
        // SmbException default ctor leaves status 0, which equals NT_STATUS_SUCCESS
        assertEquals(NtStatus.NT_STATUS_SUCCESS, ex.getNtStatus(), "Default status should be success (0)");
    }

   *
   * <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
   * typically useful for {@code return} statements. That leaves the code with two options: Either
   * add the suppression to the whole method (which turns off checking for a large section of code),
   * or extract a variable, and put the suppression on that. However, a local variable typically

   *
   * <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
   * typically useful for {@code return} statements. That leaves the code with two options: Either
   * add the suppression to the whole method (which turns off checking for a large section of code),
   * or extract a variable, and put the suppression on that. However, a local variable typically

   *
   * <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
   * typically useful for {@code return} statements. That leaves the code with two options: Either
   * add the suppression to the whole method (which turns off checking for a large section of code),
   * or extract a variable, and put the suppression on that. However, a local variable typically

   *
   * <p>Why <i>not</i> just add {@code SuppressWarnings}? The problem is that this method is
   * typically useful for {@code return} statements. That leaves the code with two options: Either
   * add the suppression to the whole method (which turns off checking for a large section of code),
   * or extract a variable, and put the suppression on that. However, a local variable typically

	if err != nil {
		t.Fatal(err)
	}
	existingETag := objInfo.ETag

	// Simulate read quorum failure by taking enough disks offline
	// With 16 disks (EC 8+8), read quorum is 9. Taking 8 disks offline leaves only 8,
	// which is below read quorum.
	erasureDisks := xl.getDisks()
	z.serverPools[0].erasureDisksMu.Lock()
	xl.getDisks = func() []StorageAPI {
		for i := range erasureDisks[:8] {
			erasureDisks[i] = nil
		}

	if err != nil {
		t.Fatal(err)
	}
	existingETag := objInfo.ETag

	// Simulate read quorum failure by taking enough disks offline
	// With 16 disks (EC 8+8), read quorum is 9. Taking 8 disks offline leaves only 8,
	// which is below read quorum.
	erasureDisks := xl.getDisks()
	z.serverPools[0].erasureDisksMu.Lock()
	xl.getDisks = func() []StorageAPI {
		for i := range erasureDisks[:8] {
			erasureDisks[i] = nil
		}

			t.Errorf("Expected GetObject to fail with %v, but failed with %v", toObjectErr(errErasureReadQuorum, bucket, object), err)
		}
		gr.Close()
	}

	// Test use case 2: Make 9 disks offline, which leaves less than quorum number of disks
	// in a 16 disk Erasure setup. The original disks are 'replaced' with
	// naughtyDisks that fail after 'f' successful StorageAPI method
	// invocations, where f - [0,2)

   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this class leaves the specific choice of
   * hash code unspecified, unlike the Java 8+ equivalent.
   */
  @Override
  public abstract int hashCode();

  /**
   * Returns a string representation for this instance.
   *
   * <p><b>Comparison to {@code java.util.Optional}:</b> this class leaves the specific string