protected @Nullable C computeNext() {
        while (merged.hasNext()) {
          C next = merged.next();
          boolean duplicate = lastValue != null && comparator.compare(next, lastValue) == 0;

          // Keep looping till we find a non-duplicate value.
          if (!duplicate) {
            lastValue = next;
            return lastValue;
          }
        }

    }

    @Test
    public void testNormalizePath() throws Exception {
        // Test forward slash normalization
        assertEquals("\\share\\folder", validator.validatePath("/share/folder"));

        // Test duplicate slash removal
        assertEquals("\\share\\folder", validator.validatePath("\\\\share\\\\folder"));

        // Test trailing slash removal
        assertEquals("\\share\\folder", validator.validatePath("\\share\\folder\\"));

    @DisplayName("Should fail validation with duplicate preauth contexts")
    void testDuplicatePreauthContexts() throws Exception {
        // Given
        setResponseAsReceived(response);
        setPrivateField(response, "dialectRevision", 0x0311);

        NegotiateContextResponse[] contexts = new NegotiateContextResponse[] { createValidPreauthResponse(), createValidPreauthResponse() // Duplicate
        };

    /**
     * The number of shards for doc.
     */
    @Size(max = 10)
    public String numberOfShardsForDoc = ComponentUtil.getFessConfig().getIndexNumberOfShards();

    /**
     * The auto expand replicas for doc.
     */
    @Size(max = 10)
    public String autoExpandReplicasForDoc = ComponentUtil.getFessConfig().getIndexAutoExpandReplicas();

  public void testLastIndexOf_duplicate() {
    E[] array = createSamplesArray();
    array[getNumElements() / 2] = e0();
    collection = getSubjectGenerator().create(array);
    assertEquals(
        "lastIndexOf(duplicate) should return index of last occurrence",
        getNumElements() / 2,
        getList().lastIndexOf(e0()));
  }

			success: false,
		},
		// duplicate 'expiration' reject
		{

		},
		{
			Name: "idx_user_indices_name8",
			Type: "",
			Fields: []schema.IndexOption{
				{Field: &schema.Field{Name: "Name8"}, Length: 10},
				// Note: Duplicate Columns
				{Field: &schema.Field{Name: "Name8"}, Collate: "utf8"},
			},
		},
		{
			Class:  "UNIQUE",
			Name:   "idx_user_indices_idx_compname_1",
			Option: "NULLS NOT DISTINCT",

    public Builder<E> add(E element) {
      super.add(element);
      return this;
    }

    /**
     * Adds each element of {@code elements} to the {@code ImmutableSortedSet}, ignoring duplicate
     * elements (only the first duplicate element is added).
     *
     * @param elements the elements to add
     * @return this {@code Builder} object
     * @throws NullPointerException if {@code elements} contains a null element

			Value    string
		}
		ContentLengthRange contentLengthRange
	}
}

// implemented to ensure that duplicate keys in JSON
// are merged together into a single JSON key, also
// to remove any extraneous JSON bodies.
//
// Go stdlib doesn't support parsing JSON with duplicate
// keys, so we need to use this technique to merge the
// keys.
func sanitizePolicy(r io.Reader) (io.Reader, error) {

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class ListMultimapPutTester<K, V> extends AbstractListMultimapTester<K, V> {
  // MultimapPutTester tests non-duplicate values, but ignores ordering

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutAddsValueAtEnd() {
    for (K key : sampleKeys()) {
      for (V value : sampleValues()) {
        resetContainer();