}

  /**
   * Returns the single element contained in {@code iterator}.
   *
   * @throws NoSuchElementException if the iterator is empty
   * @throws IllegalArgumentException if the iterator contains multiple elements. The state of the
   *     iterator is unspecified.
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T getOnlyElement(Iterator<T> iterator) {
    T first = iterator.next();

  }

  /**
   * Returns the single element contained in {@code iterator}.
   *
   * @throws NoSuchElementException if the iterator is empty
   * @throws IllegalArgumentException if the iterator contains multiple elements. The state of the
   *     iterator is unspecified.
   */
  @ParametricNullness
  public static <T extends @Nullable Object> T getOnlyElement(Iterator<T> iterator) {
    T first = iterator.next();

     */
    public static Path getEnvPath(final String envName, final String... names) {
        return getPath("WEB-INF/", "env/" + envName, names);
    }

    /**
     * Gets the path by trying multiple locations in order of preference.
     * First tries to get the real path from servlet context, then checks various
     * fallback locations including source and target directories.
     *

    checkNotNull(valueFunction);
    return Collector.of(
        () ->
            new EnumMapAccumulator<K, V>(
                (v1, v2) -> {
                  throw new IllegalArgumentException("Multiple values for key: " + v1 + ", " + v2);
                }),
        (accum, t) -> {
          /*
           * We assign these to variables before calling checkNotNull to work around a bug in our

    checkNotNull(valueFunction);
    return Collector.of(
        () ->
            new EnumMapAccumulator<K, V>(
                (v1, v2) -> {
                  throw new IllegalArgumentException("Multiple values for key: " + v1 + ", " + v2);
                }),
        (accum, t) -> {
          /*
           * We assign these to variables before calling checkNotNull to work around a bug in our

  /** Test null reference yields error */
  public void testAddNullReference() {
    assertThrows(NullPointerException.class, () -> equalsTester.addEqualityGroup((Object) null));
  }

  /** Test equalObjects after adding multiple instances at once with a null */
  public void testAddTwoEqualObjectsAtOnceWithNull() {
    assertThrows(
        NullPointerException.class,
        () -> equalsTester.addEqualityGroup(reference, equalObject1, null));
  }

   * this builder to sort entries by value.
   *
   * <p>Builder instances can be reused - it is safe to call {@link #buildOrThrow} multiple times to
   * build multiple bimaps in series. Each bimap is a superset of the bimaps created before it.
   *
   * @since 2.0
   */
  public static final class Builder<K, V> extends ImmutableMap.Builder<K, V> {

    /**

 * row(rowKey)} and {@code rowMap().get(rowKey)} are {@link SortedMap} instances, instead of the
 * {@link Map} specified in the {@link Table} interface.
 *
 * <p>Note that this implementation is not synchronized. If multiple threads access this table
 * concurrently and one of the threads modifies the table, it must be synchronized externally.
 *
 * <p>See the Guava User Guide article on <a href=

        PREFERRED_MECHS.add(new ASN1ObjectIdentifier("1.2.840.48018.1.2.2"));
    }

    /**
     * Construct a <code>Kerb5Authenticator</code> object with <code>Subject</code>
     * which hold TGT retrieved from KDC. If multiple TGT are contained, the
     * first one will be used to retrieve user principal.
     *
     * @param subject
     *            represents the user who perform Kerberos authentication.

            validator.validatePath("\\share\\folder.");
        });
    }

    @Test
    public void testValidUncPath() throws Exception {
        // Note: Due to normalization, all multiple backslashes are reduced to single
        // so \\server\share becomes \server\share
        String path = "\\\\server\\share\\folder";
        String normalized = validator.validatePath(path);