try {
            if (dirtyGraph == null || dirtyGraph.isEmpty()) {
                return null;
            }

            MetadataGraph cleanGraph = conflictResolver.resolveConflicts(dirtyGraph, scope);

            if (cleanGraph == null || cleanGraph.isEmpty()) {
                return null;
            }

            ClasspathContainer cpc = new ClasspathContainer(scope);

    assertThrows(NullPointerException.class, () -> builder.add((String) null));
  }

  public void testBuilderAddAllHandlesNullsCorrectly() {
    {
      ImmutableMultiset.Builder<String> builder = ImmutableMultiset.builder();
      assertThrows(NullPointerException.class, () -> builder.addAll((Collection<String>) null));
    }

    {

        // Verify - the decode method strips null termination, so filename should match
        assertEquals(expectedFilename, fileBothDirectoryInfo.getFilename());
    }

    @Test
    @DisplayName("Test decode with null-terminated non-Unicode filename")
    void testDecodeWithNullTerminatedNonUnicodeFilename() throws SMBProtocolDecodingException {
        // Prepare test data with null-terminated filename

        buffer[10 + stringBytes.length] = 0; // null terminator

        // Use reflection to call protected readString method
        Method readStringMethod = getReadStringMethod();
        String result = (String) readStringMethod.invoke(response, buffer, 10, 128, false);

        assertEquals(testString, result);
    }

    @Test
    @DisplayName("Test readString with null terminator in middle")

        return actionClass;
    }

    /**
     * Overrides fillInStackTrace to return null for performance optimization.
     * This prevents stack trace generation for this exception type.
     *
     * @return null to skip stack trace generation
     */
    @Override
    public synchronized Throwable fillInStackTrace() {
        return null;
    }

        assertEquals("b", result[1]);
        assertEquals("c", result[2]);
    }

    public void test_distinct_withNullElements() {
        // Test distinct with null elements
        String[] input = new String[] { "a", null, "b", null, "a" };
        String[] result = invokeDistinct(input);
        assertEquals(3, result.length);
        assertEquals("a", result[0]);
        assertNull(result[1]);

                wConfig.setAvailable(Constants.T);
                wConfig.setBoost(1.0f);
                wConfig.setCreatedBy(username);
                wConfig.setCreatedTime(now);
                if (form.depth != null) {
                    wConfig.setDepth(form.depth);
                }
                wConfig.setExcludedDocUrls(getDefaultString("default.config.web.excludedDocUrls", StringUtil.EMPTY));

            }

            final UnicodeString ucstr = new UnicodeString(resp.name, false);
            out.acctName = ucstr.toString();
            out.type = resp.sid_type;
            out.origin_server = null;
            out.origin_ctx = null;
        }
    }

    void resolveSids0(final String authorityServerName, final CIFSContext tc, final jcifs.SID[] sids) throws CIFSException {
        synchronized (this.sidCache) {

            // RdmaCompletionEvent event = endpoint.getCqProcessor().getCqEvent(timeout);
            // if (event != null) {
            //     return event.getBuffer();
            // }
            // return null;

            // For skeleton implementation, return null (timeout)
            return null;

        } catch (Exception e) {
            state = RdmaConnectionState.ERROR;

    // return responseData;
    // }
    // }
    // return null;
    // }
    // });
    // }
    // List<Future<ResponseData>> futureList = executorService.invokeAll(list);
    // for (Future<ResponseData> future : futureList) {
    // ResponseData responseData = future.get();
    // if (responseData != null) {
    // System.out.println("status: "
    // + responseData.getHttpStatusCode()