#### Utility: compare with alternatives


        There is always *some* alternative to adding a new feature to Guava, even if it's just
        forking Guava yourself.


        We want to see that new features have some significant advantage over the alternatives.
        These advantages can take

        UserCQ cq = new UserCQ();
        if (queryLambda != null) {
            queryLambda.callback(cq);
        }
        FilterAggregationBuilder builder = regFilterA(name, cq.getQuery());
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            UserCA ca = new UserCA();
            aggsLambda.callback(ca);

    }

    public Throwable getRootCause() {
        return rootCause;
    }
    public String toString() {
        if( rootCause != null ) {
            StringWriter sw = new StringWriter();
            PrintWriter pw = new PrintWriter( sw );
            rootCause.printStackTrace( pw );
            return super.toString() + "\n" + sw;
        } else {
            return super.toString();
        }
    }

    public static final File USER_MAVEN_CONFIGURATION_HOME = new File(USER_HOME, ".m2");

    public static final File DEFAULT_USER_SETTINGS_FILE = new File(USER_MAVEN_CONFIGURATION_HOME, "settings.xml");

    public static final File DEFAULT_PROJECT_SETTINGS_FILE = new File(".mvn", "settings.xml");

    public static final File DEFAULT_INSTALLATION_SETTINGS_FILE =
            new File(System.getProperty("maven.conf"), "settings.xml");

  @SuppressWarnings("JUnitIncompatibleType")
  public void testBuilder_withMutableEntry() {
    ImmutableMultimap.Builder<String, Integer> builder = new Builder<>();
    final StringHolder holder = new StringHolder();
    holder.string = "one";
    Entry<String, Integer> entry =
        new AbstractMapEntry<String, Integer>() {
          @Override
          public String getKey() {
            return holder.string;
          }

    @Test
    void testModelVersion() {
        Model initial = new Model(org.apache.maven.api.model.Model.newBuilder()
                .namespaceUri("http://maven.apache.org/POM/4.0.0")
                .build());
        Model expected = new Model(org.apache.maven.api.model.Model.newBuilder()
                .namespaceUri("http://maven.apache.org/POM/4.0.0")

    public Entry<K, Collection<V>>[] createArray(int length) {
      return (Entry<K, Collection<V>>[]) new Entry<?, ?>[length];
    }

    @Override
    public Iterable<Entry<K, Collection<V>>> order(List<Entry<K, Collection<V>>> insertionOrder) {
      Map<K, Collection<V>> map = new HashMap<>();
      List<Entry<K, V>> builder = new ArrayList<>();
      for (Entry<K, Collection<V>> entry : insertionOrder) {

    extends IteratorBasedAbstractMap<K, V> implements BiMap<K, V>, Serializable {

  /** Returns a new, empty {@code HashBiMap} with the default initial capacity (16). */
  public static <K extends @Nullable Object, V extends @Nullable Object> HashBiMap<K, V> create() {
    return create(16);
  }

  /**
   * Constructs a new, empty bimap with the specified expected size.
   *
   * @param expectedSize the expected number of entries

    static {
        KRB5_MECH_OID = new ASN1ObjectIdentifier("1.2.840.113554.1.2.2");
        KRB5_MS_MECH_OID = new ASN1ObjectIdentifier("1.2.840.48018.1.2.2");
        SUPPORTED_MECHS = new ASN1ObjectIdentifier[] {
            KRB5_MECH_OID, KRB5_MS_MECH_OID
        };

        Oid krbNameOid = null;
        Oid krbMechOid = null;
        try {
            krbNameOid = new Oid("1.2.840.113554.1.2.2.1");

        switch ( infoClass ) {
        case FileSystemInformation.FS_FULL_SIZE_INFO:
            return new FileFsFullSizeInformation();
        case FileSystemInformation.FS_SIZE_INFO:
            return new FileFsSizeInformation();
        default:
            throw new SMBProtocolDecodingException("Unknown filesystem info class " + infoClass);
        }
    }


    /**