*       C}, instance methods are skipped for nulls test.
   *   <li>Nulls test is not performed on method return values unless the method is a visible static
   *       factory method whose return type is {@code C} or {@code C}'s subtype.
   * </ul>
   *
   * <p>In all cases, if {@code C} needs custom logic for testing nulls, you can add an explicit

    void implementationRejectsNulls() {
        SmbFilenameFilter filter = (dir, name) -> {
            if (dir == null || name == null) {
                throw new NullPointerException("dir and name must be non-null");
            }
            return true;
        };

        NullPointerException npe1 = assertThrows(NullPointerException.class, () -> filter.accept(null, "x"));

    }

    /**
     * Test getAnchorSet with null input
     */
    @Test
    public void test_getAnchorSet_withNull() {
        FessCrawlerThread crawlerThread = new FessCrawlerThread();

        Set<RequestData> result = crawlerThread.getAnchorSet(null);
        assertNull(result, "getAnchorSet should return null for null input");
    }

    /**
     * Test getAnchorSet with single string

    assertTrue("add(null) should return true", collection.add(null));
    expectAdded((E) null);
  }

  @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES)
  public void testAdd_nullUnsupported() {
    assertThrows(NullPointerException.class, () -> collection.add(null));
    expectUnchanged();
    expectNullMissingWhenNullUnsupported("Should not contain null after unsupported add(null)");
  }

    assertTrue("add(null) should return true", collection.add(null));
    expectAdded((E) null);
  }

  @CollectionFeature.Require(value = SUPPORTS_ADD, absent = ALLOWS_NULL_VALUES)
  public void testAdd_nullUnsupported() {
    assertThrows(NullPointerException.class, () -> collection.add(null));
    expectUnchanged();
    expectNullMissingWhenNullUnsupported("Should not contain null after unsupported add(null)");
  }

    return asImmutableList(array);
  }

  /** Views the array as an immutable list. Checks for nulls; does not copy. */
  private static <E> ImmutableList<E> construct(Object... elements) {
    return asImmutableList(checkElementsNotNull(elements));
  }

  /**
   * Views the array as an immutable list. Does not check for nulls; does not copy.
   *
   * <p>The array must be internally created.
   */

        current.elemCount = 0;
        // Also clear these fields so that one deleted Entry doesn't retain all elements.
        current.left = null;
        current.right = null;
        current.pred = null;
        current.succ = null;

        current = next;
      }
      successor(header, header);
      rootReference.clear();
    } else {

        // Comprehensive test to verify all methods return expected values
        FessJsonResourceProvider testProvider = new FessJsonResourceProvider();

        // Verify nulls suppression is enabled
        assertTrue("Nulls should be suppressed", testProvider.isNullsSuppressed());

        // Verify pretty print is enabled
        assertFalse("Pretty print should not be suppressed", testProvider.isPrettyPrintSuppressed());

       *
       * TODO(cpovirk): It might be nice for our InterruptibleTask subclasses to null out their
       *  `callable` fields automatically. That would make it less important for us to null out the
       * reference to `task` here (though it's still nice to do so in case our reference to the
       * executor keeps it alive). Ideally, nulling out `callable` would be the responsibility of

          + "justo commodo quam bibendum ut gravida leo accumsan. Nullam malesuada sagittis diam, "
          + "quis suscipit mauris euismod vulputate. Pellentesque ultrices tellus sed lorem "
          + "aliquet pulvinar. Nam lorem nunc, ultrices at auctor non, scelerisque eget turpis. "
          + "Nullam eget varius erat. Sed a lorem id arcu dictum euismod. Fusce lectus odio, "