assertNull(Strings.emptyToNull(null));
    assertNull(Strings.emptyToNull(""));
    assertEquals("a", Strings.emptyToNull("a"));
  }

  public void testIsNullOrEmpty() {
    assertTrue(Strings.isNullOrEmpty(null));
    assertTrue(Strings.isNullOrEmpty(""));
    assertFalse(Strings.isNullOrEmpty("a"));
  }

  public void testPadStart_noPadding() {
    assertSame("", Strings.padStart("", 0, '-'));

    String[] array = new String[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (String) e;
    }
    return create(array);
  }

  /**
   * Creates a new collection containing the given elements; implement this method instead of {@link
   * #create(Object...)}.
   */
  protected abstract List<String> create(String[] elements);

  @Override

	bytes, _ := v.ToBytes()
	ok = true
	switch strings.ToLower(strings.TrimSpace(string(bytes))) {
	case "t", "true", "1":
		val = true
	case "f", "false", "0":
		val = false
	default:
		ok = false
	}
	return val, ok
}

// bytesToString - never fails, but returns empty string if value is not bytes.
func (v Value) bytesToString() string {
	bytes, _ := v.ToBytes()
	return string(bytes)
}

	loadPolicyDoc(ctx context.Context, policy string, m map[string]PolicyDoc) error
	loadPolicyDocWithRetry(ctx context.Context, policy string, m map[string]PolicyDoc, retries int) error
	loadPolicyDocs(ctx context.Context, m map[string]PolicyDoc) error
	loadUser(ctx context.Context, user string, userType IAMUserType, m map[string]UserIdentity) error
	loadSecretKey(ctx context.Context, user string, userType IAMUserType) (string, error)

			// does not match
			if recursive && !strings.HasPrefix(rule.Prefix(), prefix) && !strings.HasPrefix(prefix, rule.Prefix()) {
				continue
			}
		}
		return true
	}
	return false
}

// FilterTargetArns returns a slice of distinct target arns in the config
func (c Config) FilterTargetArns(obj ObjectOpts) []string {
	var arns []string

	tgtsMap := make(map[string]struct{})
	rules := c.FilterActionableRules(obj)

}

func parseGoroutineType2(path string) (map[time.Duration][]string, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}

	bf := bytes.Buffer{}

	save := func(s string) {
		bf.WriteString(s + "\n")
	}
	reset := func() {
		bf.Reset()
	}

	ret := make(map[time.Duration][]string)

	s := bufio.NewScanner(f)
	s.Split(bufio.ScanLines)

	var (

  @Override
  public Collection<String> create(Object... elements) {
    String[] array = new String[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (String) e;
    }
    return create(array);
  }

  protected abstract Collection<String> create(String[] elements);

  @Override
  public String[] createArray(int length) {
    return new String[length];
  }

	}
	return keys
}

func (kvs KVS) String() string {
	var s strings.Builder
	for _, kv := range kvs {
		s.WriteString(kv.String())
		s.WriteString(KvSpaceSeparator)
	}
	return s.String()
}

// Merge environment values with on disk KVS, environment values overrides
// anything on the disk.
func Merge(cfgKVS map[string]KVS, envname string, defaultKVS KVS) map[string]KVS {
	newCfgKVS := make(map[string]KVS)

    String[] array = new String[elements.length];
    int i = 0;
    for (Object e : elements) {
      array[i++] = (String) e;
    }
    return create(array);
  }

  /**
   * Creates a new collection containing the given elements; implement this method instead of {@link
   * #create(Object...)}.
   */
  protected abstract List<String> create(String[] elements);

  @Override

					}
					continue
				}
				meta.name = strings.TrimSuffix(entry, xlStorageFormatFileV1)
				meta.name = strings.TrimSuffix(meta.name, SlashSeparator)
				meta.name = pathJoinBuf(sb, current, meta.name)

				return send(meta)
			}
			// Skip all other files.
		}

		// Process in sort order.
		sort.Strings(entries)
		dirStack := make([]string, 0, 5)