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

    /**
     * Adds each element of {@code elements} to the {@code ImmutableSet}, ignoring duplicate
     * elements (only the first duplicate element is added).
     *
     * @param elements the elements to add
     * @return this {@code Builder} object

     */
    public static PathMappingHelper getPathMappingHelper() {
        return getComponent(PATH_MAPPING_HELPER);
    }

    /**
     * Gets the duplicate host helper component.
     * @return The duplicate host helper.
     */
    public static DuplicateHostHelper getDuplicateHostHelper() {
        return getComponent(DUPLICATE_HOST_HELPER);
    }

    /**

	for _, zep := range *l {
		for _, ep := range zep.Endpoints {
			existSet.Add(ep.String())
		}
	}
	// Validate if there are duplicate endpoints across serverPools
	for _, ep := range zeps.Endpoints {
		if existSet.Contains(ep.String()) {
			return fmt.Errorf("duplicate endpoints found")
		}
	}
	*l = append(*l, zeps)
	return nil
}

// Localhost - returns the local hostname from list of endpoints

        queryContext = new QueryContext("test", true);
        queryContext.addHighlightedQuery("text1");
        queryContext.addHighlightedQuery("text2");
        queryContext.addHighlightedQuery("text1"); // Duplicate

        Set<String> highlightedSet = (Set<String>) getMockRequest().getAttribute(Constants.HIGHLIGHT_QUERIES);
        assertNotNull(highlightedSet);
        assertEquals(2, highlightedSet.size());

            decodedContext.decode(buffer, 0, encoded);

            assertArrayEquals(ciphers, decodedContext.getCiphers());
        }

        @Test
        @DisplayName("Should handle duplicate ciphers")
        void testDuplicateCiphers() throws SMBProtocolDecodingException {
            int[] ciphers = { EncryptionNegotiateContext.CIPHER_AES128_CCM, EncryptionNegotiateContext.CIPHER_AES128_CCM,

		// Range cannot start bigger than end.
		{":9000", []string{"/export1{64...1}"}, false},
		// Range can only be numeric.
		{":9000", []string{"/export1{a...z}"}, false},
		// Duplicate disks not allowed.
		{":9000", []string{"/export1{1...32}", "/export1{1...32}"}, false},
		// Same host cannot export same disk on two ports - special case localhost.

                if (field.getType().equals(HtmlNext.class)) {
                    HtmlNext htmlNext = (HtmlNext) field.get(null);
                    String path = htmlNext.getRoutingPath();
                    assertFalse("Duplicate path found: " + path + " in field " + field.getName(), paths.contains(path));
                    paths.add(path);
                }
            }
        }
        assertTrue("Should have unique paths", paths.size() > 0);

        const auto& v = a_edges.insert({iter->second, arg.name()});
        ASSERT_TRUE(v.second) << "Duplicate edge " << iter->second << " -> "
                              << arg.name() << ". fdef: " << fdef.DebugString();
      } else {
        const auto& v = a_edges.insert({arg.name(), arg.name()});
        ASSERT_TRUE(v.second) << "Duplicate edge " << arg.name() << " -> "

   * insertion order.
   */
  private void populateTShapedGraph() {
    putEdge(2, 1);
    putEdge(1, 4);
    putEdge(1, 3);
    putEdge(1, 2); // Duplicate
    putEdge(4, 5);
  }

  // Element Mutation

  @Test
  public void putEdge_existingNodes() {
    assume().that(graphIsMutable()).isTrue();

        assertEquals(1024, decodedHeader.getOriginalMessageSize());
        assertEquals(0x0001, decodedHeader.getFlags());
        assertEquals(testSessionId, decodedHeader.getSessionId());
    }

    // Duplicate testFlags method removed - keeping the first one

    @ParameterizedTest
    @ValueSource(ints = { 0, 1, 64, 1024, 4096, 65536 })
    @DisplayName("Should handle various message sizes")