* safe to do so. The exact circumstances under which a copy will or will not be performed are
   * undocumented and subject to change.
   *
   * @throws NullPointerException if any key or value in {@code multimap} is null
   */
  public static <K, V> ImmutableSetMultimap<K, V> copyOf(
      Multimap<? extends K, ? extends V> multimap) {
    return copyOf(multimap, null);
  }

        }
      }
    }
  }

  public void testToArray_withNull() {
    List<@Nullable Double> list = Arrays.asList(0.0, 1.0, null);
    assertThrows(NullPointerException.class, () -> Doubles.toArray(list));
  }

  public void testToArray_withConversion() {
    double[] array = {0.0, 1.0, 2.0};

    List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);

          assertThat(arr[j]).isEqualTo(VALUES[j]);
        }
      }
    }
  }

  public void testToArray_withNull() {
    List<@Nullable Long> list = Arrays.asList(0L, 1L, null);
    assertThrows(NullPointerException.class, () -> Longs.toArray(list));
  }

  public void testToArray_withConversion() {
    long[] array = {0L, 1L, 2L};

    List<Byte> bytes = Arrays.asList((byte) 0, (byte) 1, (byte) 2);

    assertEquals(2, (int) result.next());
    assertThrows(NullPointerException.class, () -> result.hasNext());
    assertThrows(NullPointerException.class, () -> result.next());
    // There is no way to get "through" to the 3.  Buh-bye
  }

  public void testConcatVarArgsContainingNull() {
    assertThrows(
        NullPointerException.class,
        () ->
            Iterators.concat(

            private static final long serialVersionUID = 1L;

            @Override
            public String get(String key) {
                // Override to return empty string instead of null to avoid NullPointerException
                return "";
            }

            @Override
            public String getIndexFieldTitle() {
                return "title";
            }

            @Override

    return asImmutableList(array);
  }

  private static <E> List<E> nullCheckedList(Object... array) {
    for (int i = 0, len = array.length; i < len; i++) {
      if (array[i] == null) {
        throw new NullPointerException("at index " + i);
      }
    }
    @SuppressWarnings("unchecked")
    E[] castedArray = (E[]) array;
    return Arrays.asList(castedArray);
  }

  @Override

            TestDcerpcHandle handleWithNullBinding = new TestDcerpcHandle(mockContext);

            // When/Then: Should throw NPE for null binding (expected behavior)
            assertThrows(NullPointerException.class, () -> handleWithNullBinding.toString());
        }

        @Test
        @DisplayName("Should handle session key retrieval")
        void testSessionKeyRetrieval() throws CIFSException {

        // keep retries small for faster and deterministic tests
        when(config.getMaxRequestRetries()).thenReturn(2);
        when(config.isTraceResourceUsage()).thenReturn(false);
        // Mock credentials to avoid NullPointerException
        when(ctx.getCredentials()).thenReturn(credentials);
        when(credentials.getUserDomain()).thenReturn("DOMAIN");
        // Mock DFS resolver
        when(ctx.getDfs()).thenReturn(dfsResolver);
    }

    }

    @Test
    @DisplayName("Null treeConnection throws NPE")
    void constructorNullTreeConnection() {
        // Null treeConnection throws NPE when acquire() is called
        assertThrows(NullPointerException.class, () -> new SmbTreeHandleImpl(resourceLoc, null));
    }

    @Test
    @DisplayName("Null resourceLoc is accepted but may cause issues later")
    void constructorNullResourceLoc() {

        private static final long serialVersionUID = 1L;

        public TestFessConfig() {
            super();
            // Initialize the properties to avoid NullPointerException
            try {
                java.lang.reflect.Field propField = org.lastaflute.core.direction.ObjectiveConfig.class.getDeclaredField("prop");
                propField.setAccessible(true);