*
     * @param settings The settings' string representation, may be empty or {@code null}.
     */
    public StringSettingsSource(CharSequence settings) {
        this(settings, null);
    }

    /**
     * Creates a new settings source backed by the specified string.
     *
     * @param settings The settings' string representation, may be empty or {@code null}.

     */
    public OptionalEntity<CharMappingFile> getCharMappingFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)
                .filter(CharMappingFile.class::isInstance)
                .map(file -> OptionalEntity.of((CharMappingFile) file))
                .orElse(OptionalEntity.empty());
    }

    /**

   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")
  public static <T> Collector<T, ?, Optional<T>> toOptional() {
    return (Collector) TO_OPTIONAL;
  }

	}

	// There are two possibilities:
	// - We use a KMS -> There must be non-empty key ID and a KMS data key.
	// - We use a K/V -> There must be no key ID and no KMS data key.
	// Otherwise, the caller has passed an invalid argument combination.
	if keyID == "" && len(kmsKey) != 0 {
		logger.CriticalIf(context.Background(), errors.New("The key ID must not be empty if a KMS data key is present"))
	}
	if keyID != "" && len(kmsKey) == 0 {

        assertTrue(elevateWord.getRoles().isEmpty());
    }

    @Test
    public void testConstructorWithEmptyLists() {
        // Test constructor with empty lists
        String word = "empty lists";
        float boost = 1.0f;
        List<String> readings = Collections.emptyList();
        List<String> fields = Collections.emptyList();
        List<String> tags = Collections.emptyList();

                    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")

    /**
     * An empty string <code>""</code>.
     */
    public static final String EMPTY = "";

    /**
     * An empty array of strings.
     */
    public static final String[] EMPTY_STRINGS = new String[0];

    /**
     * Checks if the string is empty or null.
     *
     * @param text the string to check
     * @return true if empty or null, false otherwise
     */

            assertEquals(0, map.size());
        }

        // Test with empty values
        configParameters = "config.empty=\nfield.xpath.empty=";
        result = ParameterUtil.createConfigParameterMap(configParameters);
        assertEquals(1, result.get(ConfigName.CONFIG).size());
        assertEquals("", result.get(ConfigName.CONFIG).get("empty"));
        assertEquals(1, result.get(ConfigName.XPATH).size());

     * The default value is empty.
     */
    default Optional<String> module() {
        return Optional.empty();
    }

    /**
     * {@return the version of the platform where the code will be executed}
     * In a Java environment, this is the value of the {@code --release} compiler option.
     * The default value is empty.
     */
    default Optional<Version> targetVersion() {

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()).