}
        return Optional.empty();
    }

    @Override
    public Optional<Boolean> showVersionAndExit() {
        if (commandLine.hasOption(CLIManager.SHOW_VERSION_AND_EXIT)) {
            return Optional.of(Boolean.TRUE);
        }
        return Optional.empty();
    }

    @Override
    public Optional<Boolean> showVersion() {

    data.write("8a00".decodeHex()) // Pong
    data.write("80026c6f".decodeHex()) // lo
    clientReader.processNextFrame()
    callback.assertPong(EMPTY)
    callback.assertPong(EMPTY)
    callback.assertPong(EMPTY)
    callback.assertPong(EMPTY)
    callback.assertTextMessage("Hello")
  }

  @Test fun clientTwoFrameCompressedHelloWithPongs() {

func (b *Buffer) Peek(n int) ([]byte, error) {
	if b.Len() < n {
		return b.buf[b.off:], io.EOF
	}
	return b.buf[b.off : b.off+n], nil
}

// empty reports whether the unread portion of the buffer is empty.
func (b *Buffer) empty() bool { return len(b.buf) <= b.off }

// Len returns the number of bytes of the unread portion of the buffer;
// b.Len() == len(b.Bytes()).

	if spc {
		s.WriteString(KvDoubleQuote)
	}
	return s.String()
}

// KVS - is a shorthand for some wrapper functions
// to operate on list of key values.
type KVS []KV

// Empty - return if kv is empty
func (kvs KVS) Empty() bool {
	return len(kvs) == 0
}

// Clone - returns a copy of the KVS
func (kvs KVS) Clone() KVS {
	return append(make(KVS, 0, len(kvs)), kvs...)
}

  public void testConcat() {
    assertThat(Shorts.concat()).isEqualTo(EMPTY);
    assertThat(Shorts.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Shorts.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);
    assertThat(Shorts.concat(ARRAY1)).isEqualTo(ARRAY1);
    assertThat(Shorts.concat(ARRAY1)).isNotSameInstanceAs(ARRAY1);
    assertThat(Shorts.concat(EMPTY, ARRAY1, EMPTY)).isEqualTo(ARRAY1);
    assertThat(Shorts.concat(ARRAY1, ARRAY1, ARRAY1))

}

// Empty buf through repeated reads into fub.
// The initial contents of buf corresponds to the string s.
func empty(t *testing.T, testname string, buf *Buffer, s string, fub []byte) {
	check(t, testname+" (empty 1)", buf, s)

	for {
		n, err := buf.Read(fub)
		if n == 0 {
			break
		}
		if err != nil {
			t.Errorf(testname+" (empty 2): err should always be nil, found err == %s", err)

		// Test listing an empty directory in recursive mode (62)
		{"test-bucket-empty-dir", "", "", "", 10, resultCases[31], nil, true},
		// Test listing an empty directory in a non recursive mode (63)
		{"test-bucket-empty-dir", "", "", SlashSeparator, 10, resultCases[32], nil, true},
		// Test listing a directory which contains an empty directory (64)

    assertThat(Booleans.concat()).isEqualTo(EMPTY);
    assertThat(Booleans.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Booleans.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);
    assertThat(Booleans.concat(ARRAY_FALSE)).isEqualTo(ARRAY_FALSE);
    assertThat(Booleans.concat(ARRAY_FALSE)).isNotSameInstanceAs(ARRAY_FALSE);
    assertThat(Booleans.concat(EMPTY, ARRAY_FALSE, EMPTY)).isEqualTo(ARRAY_FALSE);

                    Arguments.of("", "test-project", "1.0.0", "Should return null for empty groupId"),
                    Arguments.of("com.example", "", "1.0.0", "Should return null for empty artifactId"),
                    Arguments.of("com.example", "test-project", "", "Should return null for empty version"));
        }
    }

    @Nested
    @DisplayName("Artifact Computation")

		return false, err
	}

	var addr1Local, addr2Local bool

	if host1 == "" {
		// If empty host means it is localhost
		addr1Local = true
	} else if addr1Local, err = isLocalHost(host1, port1, port1); err != nil {
		// Host not empty, check if it is local
		return false, err
	}

	if host2 == "" {
		// If empty host means it is localhost
		addr2Local = true