*
     * @return the application type string, or empty string if not set
     */
    public static String getAppType() {
        final String appType = System.getenv(FESS_APP_TYPE);
        if (StringUtil.isNotBlank(appType)) {
            return appType;
        }
        return StringUtil.EMPTY;
    }

    /**

}

// Test that the line splitter handles a final empty line.
func TestScanLineEmptyFinalLine(t *testing.T) {
	const text = "abcdefghijklmn\nopqrstuvwxyz\n\n"
	lines := []string{
		"abcdefghijklmn",
		"opqrstuvwxyz",
		"",
	}
	testNoNewline(text, lines, t)
}

// Test that the line splitter handles a final empty line with a carriage return but no newline.

   * <p>Two {@code SetMultimap} instances are equal if, for each key, they contain the same values.
   * Equality does not depend on the ordering of keys or values.
   *
   * <p>An empty {@code SetMultimap} is equal to any other empty {@code Multimap}, including an
   * empty {@code ListMultimap}.
   */
  @Override
  boolean equals(@Nullable Object obj);

   * <p>Two {@code SetMultimap} instances are equal if, for each key, they contain the same values.
   * Equality does not depend on the ordering of keys or values.
   *
   * <p>An empty {@code SetMultimap} is equal to any other empty {@code Multimap}, including an
   * empty {@code ListMultimap}.
   */
  @Override
  boolean equals(@Nullable Object obj);

                               aria-controls="listSearchForm"><i class="fas fa-search" aria-hidden="true"></i></a>
                            <div class="collapse <c:if test="${!empty regex || !empty replacement}">show</c:if>" id="listSearchForm">
                                <la:form action="/admin/pathmap/">
                                    <div class="form-group row">

		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

   * @param elements the elements that the multiset should contain
   * @throws IllegalArgumentException if {@code elements} is empty
   */
  public static <E extends Enum<E>> EnumMultiset<E> create(Iterable<E> elements) {
    Iterator<E> iterator = elements.iterator();
    checkArgument(iterator.hasNext(), "EnumMultiset constructor passed empty Iterable");
    EnumMultiset<E> multiset = new EnumMultiset<>(iterator.next().getDeclaringClass());

    assertTrue(collection.contains(e0()));
  }

  /*
   * AbstractCollection fails the removeAll(null) test when the subject
   * collection is empty, but we'd still like to test removeAll(null) when we
   * can. We split the test into empty and non-empty cases. This allows us to
   * suppress only the former.
   */

  @CollectionFeature.Require(SUPPORTS_REMOVE)
  @CollectionSize.Require(ZERO)

// client setting, note this will fail if set to empty when
// constructor initializes.
func DomainNames(domainNames []string) EtcdOption {
	return func(args *CoreDNS) {
		args.domainNames = domainNames
	}
}

// DomainIPs set a list of custom domain IPs, note this will
// fail if set to empty when constructor initializes.
func DomainIPs(domainIPs set.StringSet) EtcdOption {

/**
 * Service interface to detect CI system process runs on, if any.
 *
 * @since 4.0.0
 */
public interface CIDetector {
    /**
     * Returns non-empty optional with CI information, if CI is detected, empty otherwise.
     */
    Optional<CIInfo> detectCI();