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() {

        };

        assertEquals("Empty minKey should be empty string", "", emptyKeysAnnotation.minKey());
        assertEquals("Empty maxKey should be empty string", "", emptyKeysAnnotation.maxKey());
        assertTrue("Empty minKey should match StringUtil.EMPTY", StringUtil.EMPTY.equals(emptyKeysAnnotation.minKey()));
        assertTrue("Empty maxKey should match StringUtil.EMPTY", StringUtil.EMPTY.equals(emptyKeysAnnotation.maxKey()));
    }

     * If the input array is {@code null}, an empty stream is returned.
     *
     * @param <T> The type of elements in the stream.
     * @param values The elements to be included in the stream. Can be {@code null}.
     * @return A {@link StreamOf} instance containing the provided values, or an empty stream if {@code values} is {@code null}.
     */
    @SafeVarargs

     * Even if empty string, treated as empty plainly. So "IF pmb != null" is false if empty.
     * @param hostname The parameter value of hostname. (NotNull)
     */
    public void setHostname(String hostname) {
        registerVariable("hostname", hostname);
    }

    /**
     * Set the value of clustername, used in parameter comment. <br>

     *            The property name. Must not be {@literal null} or empty string
     * @return Whether the {@link PropertyDesc} exists
     */
    boolean hasPropertyDesc(String propertyName);

    /**
     * Returns the {@link PropertyDesc}.
     *
     * @param propertyName
     *            The property name. Must not be {@literal null} or empty string
     * @return {@link PropertyDesc}
     */

     * Sets a converter for dates.
     *
     * @param pattern
     *            The date pattern. Must not be {@literal null} or an empty string.
     * @param propertyNames
     *            The property names to which this converter will be applied. Each element must not be {@literal null} or an empty string.
     * @return This instance itself
     * @see DateConverter
     */

 */
public class LineIterator implements Iterator<String> {

    /** String object indicating that {@link #line} is empty */
    protected static final String EMPTY = new String();

    /** {@link BufferedReader} */
    protected final BufferedReader reader;

    /** The line that has been read */
    protected String line = EMPTY;

    /**
     * Returns an {@link Iterable} that wraps a {@link LineIterator} for use in enhanced for-loops.

    }

    default void setDefaultLabelValue(final String value) {
        setSystemProperty(Constants.DEFAULT_LABEL_VALUE_PROPERTY, value);
        propMap.remove(DEFAULT_LABEL_VALUES);
    }

    default String getDefaultLabelValue() {
        return getSystemProperty(Constants.DEFAULT_LABEL_VALUE_PROPERTY, StringUtil.EMPTY);
    }

    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);

				href="#searchOptions" class="badge text-bg-primary text-decoration-none"
				data-bs-toggle="collapse"> <c:if test="${empty lang}">
						<la:message key="labels.searchoptions_all" />
					</c:if> <c:if test="${!empty lang}">
						<c:forEach var="sLang" items="${lang}">
							<c:forEach var="item" items="${langItems}">
								<c:if test="${item.value==sLang}">${f:h(item.label)}</c:if>