* immutable <i>supplier</i> of {@code InputStream} instances.
 *
 * <p>{@code ByteSource} provides two kinds of methods:
 *
 * <ul>
 *   <li><b>Methods that return a stream:</b> These methods should return a <i>new</i>, independent
 *       instance each time they are called. The caller is responsible for ensuring that the
 *       returned stream is closed.

        Object logger = loggerField.get(null); // static field

        // Verify logger is not null
        assertNotNull(logger);

        // Verify logger is of the expected type
        assertTrue(logger instanceof org.apache.logging.log4j.Logger);
    }

    // Test concurrent execution of hook method
    public void test_hook_concurrentExecution() throws Exception {

    final int value;

    Impl(int value) {
      this.value = value;
    }

    @Override
    public boolean equals(@Nullable Object obj) {
      return obj instanceof Impl && value == ((Impl) obj).value;
    }

    @Override
    public int hashCode() {
      return value;
    }

    @Override
    public String toString() {

    }

    @Override
    Cell<R, C, V> get(int index) {
      return getCell(index);
    }

    @Override
    public boolean contains(@Nullable Object object) {
      if (object instanceof Cell) {
        Cell<?, ?, ?> cell = (Cell<?, ?, ?>) object;
        Object value = RegularImmutableTable.this.get(cell.getRowKey(), cell.getColumnKey());
        return value != null && value.equals(cell.getValue());
      }

     */
    protected static String toString(final Object message) {
        if (message == null) {
            return "null";
        }
        if (message instanceof String) {
            return (String) message;
        }
        return message.toString();
    }

    /**
     * The message to be logged.
     *
     * @author koichik
     */

    Iterator<Integer> source = asList(1, 2, 3).iterator();
    Iterator<List<Integer>> partitions = Iterators.partition(source, 2);
    assertTrue(partitions.next() instanceof RandomAccess);
    assertTrue(partitions.next() instanceof RandomAccess);
  }

  public void testPaddedPartition_badSize() {
    Iterator<Integer> source = singletonIterator(1);

    void invalidInputsThrow(String name, Object bufferSupplierOrBytes, Class<? extends Throwable> expected) {
        // Arrange
        byte[] buf;
        if (bufferSupplierOrBytes instanceof byte[]) {
            buf = (byte[]) bufferSupplierOrBytes;
        } else {
            @SuppressWarnings("unchecked")

        } catch (IllegalArgumentException e) {
            // Expected
        }
    }

    // Test inheritance
    public void test_inheritance() {
        assertTrue(messages instanceof FessLabels);
        assertTrue(messages instanceof org.lastaflute.core.message.UserMessages);
    }

    // Test method chaining
    public void test_methodChaining() {
        String property1 = "prop1";

            assertTrue(context instanceof NegotiateContextRequest);
        }

        @Test
        @DisplayName("Should implement NegotiateContextResponse interface")
        void testImplementsNegotiateContextResponse() {
            PreauthIntegrityNegotiateContext context = new PreauthIntegrityNegotiateContext();

            assertTrue(context instanceof NegotiateContextResponse);
        }

   * without modification.
   *
   * @since 14.0
   */
  public static String toLowerCase(CharSequence chars) {
    if (chars instanceof String) {
      return toLowerCase((String) chars);
    }
    char[] newChars = new char[chars.length()];
    for (int i = 0; i < newChars.length; i++) {
      newChars[i] = toLowerCase(chars.charAt(i));
    }