}

    public void test_constructor_withNullUsername() {
        // Test with null username
        String username = null;
        FessUserNotFoundException exception = new FessUserNotFoundException(username);

        assertNotNull(exception);
        assertEquals("User is not found: null", exception.getMessage());
        assertNull(exception.getCause());
    }

    List<V> values = asList(v0(), null, v3());
    multimap().replaceValues(k0(), values);
    assertGet(k0(), values);
  }

  @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE, ALLOWS_NULL_KEYS})
  public void testReplaceValuesWithNullKey() {
    List<V> values = asList(v0(), v2(), v3());
    multimap().replaceValues(null, values);
    assertGet(null, values);
  }

  ImmutableCollection() {}

  @Override
  public abstract UnmodifiableIterator<E> iterator();

  @Override
  public boolean contains(@Nullable Object object) {
    return object != null && super.contains(object);
  }

  @Override
  public final boolean add(E e) {
    throw new UnsupportedOperationException();
  }

  @Override
  public final boolean remove(@Nullable Object object) {

    /**
     * GETs the source URI content as byte array. The source MUST BE relative from the {@link RemoteRepository#getUrl()}
     * root.
     *
     * @return the byte array if operation succeeded, {@code null} if source does not exist.
     * @throws RuntimeException If failed (and not due source not exists).
     */
    @Nonnull
    Optional<byte[]> getBytes(@Nonnull URI relativeSource);

    /**

        if (createdTime != null) {
            addFieldToSource(sourceMap, "createdTime", createdTime);
        }
        if (expiredTime != null) {
            addFieldToSource(sourceMap, "expiredTime", expiredTime);
        }
        if (name != null) {
            addFieldToSource(sourceMap, "name", name);
        }
        if (sessionId != null) {

        if (crawlingInfoId != null) {
            addFieldToSource(sourceMap, "crawlingInfoId", crawlingInfoId);
        }
        if (createdTime != null) {
            addFieldToSource(sourceMap, "createdTime", createdTime);
        }
        if (key != null) {
            addFieldToSource(sourceMap, "key", key);
        }
        if (value != null) {
            addFieldToSource(sourceMap, "value", value);

    int expectedHashCode = 0;
    for (E element : elements) {
      expectedHashCode += (element == null) ? 0 : element.hashCode();
    }

    elements.add(null);
    collection = getSubjectGenerator().create(elements.toArray());
    assertEquals(
        "A Set's hashCode() should be the sum of those of its elements (with "
            + "a null element counting as having a hash of zero).",
        expectedHashCode,
        getSet().hashCode());

            spec = "smb:////";
            limit += 2;
        } else if (!spec.startsWith("smb://") && host != null && host.length() == 0) {
            spec = "//" + spec;
            limit += 2;
        }
        super.parseURL(u, spec, start, limit);
        path = u.getPath();
        ref = u.getRef();
        if (ref != null) {
            path += '#' + ref;
        }
        port = u.getPort();
        if (port == -1) {

            keyStore.load(null, null);
            keyStore.setCertificateEntry("server", certificate);

            TrustManagerFactory trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm());
            trustManagerFactory.init(keyStore);

            SSLContext sslContext = SSLContext.getInstance("TLS");
            sslContext.init(null, trustManagerFactory.getTrustManagers(), null);

        this.elevateWord = elevateWord;
        this.boost = boost;
        this.readings = readings;
        this.fields = fields;
        if (tags == null) {
            this.tags = Collections.emptyList();
        } else {
            this.tags = tags;
        }
        if (roles == null) {
            this.roles = Collections.emptyList();
        } else {
            this.roles = roles;
        }
    }

    /**