* @return file representing the tool executable, or null if the tool cannot be found
     */
    String findTool(String toolName);

    /**
     * Let the toolchain decide if it matches requirements defined
     * in the toolchain plugin configuration.
     *
     * @param requirements key value pair, may not be {@code null}
     * @return {@code true} if the requirements match, otherwise {@code false}
     */

 *
 *   public synchronized V get() throws InterruptedException {
 *     while (value == null) {
 *       wait();
 *     }
 *     V result = value;
 *     value = null;
 *     notifyAll();
 *     return result;
 *   }
 *
 *   public synchronized void set(V newValue) throws InterruptedException {
 *     while (value != null) {
 *       wait();
 *     }
 *     value = newValue;
 *     notifyAll();
 *   }

    public void test_quoteEscape_null_input() {
        // Test null input handling
        try {
            KuromojiCSVUtil.quoteEscape(null);
            fail("Should throw NullPointerException for null input");
        } catch (NullPointerException e) {
            // Expected behavior
        }
    }

    public void test_parse_null_input() {
        // Test null input handling
        try {

        assertFalse(instance1.equals(instance3)); // Should not be equal
        assertFalse(instance1.equals(notAShareInfo)); // Should not be equal to other types
        assertFalse(instance1.equals(null)); // Should not be equal to null
    }

    /**
     * Test of hashCode method, of class SmbShareInfo.
     */
    @Test
    void testHashCode() {
        SmbShareInfo instance1 = new SmbShareInfo("SHARE1", 0, "remark1");

     *
     * @param artifact The artifact whose available versions should be determined, must not be {@code null}.
     * @return The available versions of the artifact or an empty list if none, never {@code null}.
     * @since 3.0-alpha-3
     */
    List<String> findVersions(Artifact artifact);

    /**

bad-null.txt...

final class RegularImmutableList<E> extends ImmutableList<E> {
  static final ImmutableList<Object> EMPTY = new RegularImmutableList<>(new Object[0], 0);

  // The first `size` elements are non-null.
  @VisibleForTesting final transient @Nullable Object[] array;
  private final transient int size;

  RegularImmutableList(@Nullable Object[] array, int size) {
    this.array = array;
    this.size = size;
  }

 * support even a "normal" `TypeParameter<T>` when `<T>` has a nullable bound. (See the discussion
 * on TypeToken.where.) So, in the interest of failing fast and encouraging the user to switch to a
 * non-null bound if possible, let's require a non-null bound here.
 *
 * TODO(cpovirk): Elaborate on "wouldn't behave as users might expect."
 */
public abstract class TypeParameter<T> extends TypeCapture<T> {

  final TypeVariable<?> typeVariable;

  }

  public void testVerifyNotNull_complexMessage_success() {
    String result = verifyNotNull(NON_NULL_STRING, "%s", IGNORE_ME);
    assertSame(NON_NULL_STRING, result);
  }

  public void testVerifyNotNull_simpleMessage_failure() {
    VerifyException expected =
        assertThrows(VerifyException.class, () -> verifyNotNull(null, FORMAT, 5));
    checkMessage(expected);
  }

        this(messageCode, new Object[0], null);
    }

    /**
     * Creates {@link ClRuntimeException}.
     *
     * @param messageCode message code
     * @param args arguments for messages
     */
    public ClRuntimeException(final String messageCode, final Object[] args) {
        this(messageCode, args, null);
    }

    /**
     * Creates {@link ClRuntimeException}.
     *