super.close();
                counter[0]--;
              }
            };
          }
        };
    byte[] result = ByteSource.concat(checker, checker, checker).read();
    assertThat(result).hasLength(150);
  }

  private void joinHelper(Integer... spans) throws Exception {
    List<ByteSource> sources = new ArrayList<>();
    int start = 0;

    @Override
    @ParametricNullness
    public V apply(@ParametricNullness K key) {
      V result = map.get(key);
      checkArgument(result != null || map.containsKey(key), "Key '%s' not present in map", key);
      // The unchecked cast is safe because of the containsKey check.
      return uncheckedCastNullableTToT(result);
    }

    @Override
    public boolean equals(@Nullable Object o) {

    }
  }

  /**
   * Verifies that a collection is immutable.
   *
   * <p>A collection is considered immutable if:
   *
   * <ol>
   *   <li>All its mutation methods result in UnsupportedOperationException, and do not change the
   *       underlying contents.
   *   <li>All methods that return objects that can indirectly mutate the collection throw

      val result = mutableListOf<List<AttributeTypeAndValue>>()

      if (organizationalUnit != null) {
        result +=
          listOf(
            AttributeTypeAndValue(
              type = ORGANIZATIONAL_UNIT_NAME,
              value = organizationalUnit,
            ),
          )
      }

      result +=
        listOf(
          AttributeTypeAndValue(

     * unsigned long. This is useful for detecting overflow while parsing a string representation of
     * a number. Does not verify whether supplied radix is valid, passing an invalid radix will give
     * undefined results or an ArrayIndexOutOfBoundsException.
     */
    static boolean overflowInParse(long current, int digit, int radix) {
      if (current >= 0) {
        if (current < maxValueDivs[radix]) {
          return false;

editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship.

"Modified Works" shall mean any work in Source Code or other form that
results from an addition to, deletion from, or modification of the
contents of the Program, including, for purposes of clarity any new file
in Source Code form that contains any contents of the Program. Modified

        byte[] data = new byte[] { 0, 1, 2, 3, 4 };
        cos.write(data);
        assertTrue(cos.isInMemory());
        byte[] result = cos.getData();
        assertNotNull(result);
        assertArrayEquals(data, result);
        cos.close();
    }

    @Test
    public void testFlushInMemory() throws IOException {
        // flush() should work with in-memory data

    }

    @Test
    void testClose() throws CIFSException {
        assertFalse(context.isCloseCalled());

        boolean result = context.close();

        assertFalse(result); // AbstractCIFSContext always returns false for close()
        assertTrue(context.isCloseCalled());
    }

    @Test
    void testRun_successfulClose() throws CIFSException {

      switch (input) {
        case VALID_INPUT_DATA:
          outputFuture.set(RESULT_DATA);
          break;
        case SLOW_OUTPUT_VALID_INPUT_DATA:
          break; // do nothing to the result
        case SLOW_FUNC_VALID_INPUT_DATA:
          funcIsWaitingLatch.countDown();
          awaitUninterruptibly(funcCompletionLatch);
          break;
        case EXCEPTION_DATA:
          throw EXCEPTION;
      }

      switch (input) {
        case VALID_INPUT_DATA:
          outputFuture.set(RESULT_DATA);
          break;
        case SLOW_OUTPUT_VALID_INPUT_DATA:
          break; // do nothing to the result
        case SLOW_FUNC_VALID_INPUT_DATA:
          funcIsWaitingLatch.countDown();
          awaitUninterruptibly(funcCompletionLatch);
          break;
        case EXCEPTION_DATA:
          throw EXCEPTION;
      }