}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.err }

// Error 'error' compatible method.
func (e Error) Error() string {
	if e.err == nil {
		return "lifecycle: cause <nil>"
	}
	return e.err.Error()

}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.err }

// Error 'error' compatible method.
func (e Error) Error() string {
	if e.err == nil {
		return "versioning: cause <nil>"
	}
	return e.err.Error()

  /**
   * Invoked when a {@code Future} computation fails or is canceled.
   *
   * <p>If the future's {@link Future#get() get} method throws an {@link ExecutionException}, then
   * the cause is passed to this method. Any other thrown object is passed unaltered.
   */
  void onFailure(Throwable t);

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link SettingsBuilderException}.
     *
     * @return the problems that were encountered during the settings building, can be empty but never {@code null}
     */
    @Nonnull

    /**
     * Gets the problems that were encountered during the settings building. Note that only problems of severity
     * {@link BuilderProblem.Severity#WARNING} and below are reported here. Problems with a higher severity level cause
     * the settings builder to fail with a {@link ToolchainsBuilderException}.
     *
     * @return the problems that were encountered during the settings building, can be empty but never {@code null}
     */
    @Nonnull

    ListenableFuture<String> chain = buildChainingFuture(badInput);
    ExecutionException e = assertThrows(ExecutionException.class, () -> chain.get());
    assertThat(e.getCause()).isInstanceOf(BadFutureRuntimeException.class);
  }

  /** Proxy to throw a {@link RuntimeException} out of the {@link #get()} method. */
  public static class BadFuture extends SimpleForwardingListenableFuture<Integer> {

    ListenableFuture<String> chain = buildChainingFuture(badInput);
    ExecutionException e = assertThrows(ExecutionException.class, () -> chain.get());
    assertThat(e.getCause()).isInstanceOf(BadFutureRuntimeException.class);
  }

  /** Proxy to throw a {@link RuntimeException} out of the {@link #get()} method. */
  public static class BadFuture extends SimpleForwardingListenableFuture<Integer> {

    assertFailsWith<AssertionError> {
      testRule.afterEach(extensionContext)
    }.also { expected ->
      assertThat(expected).hasMessage("uncaught exception thrown during test")
      assertThat(expected.cause!!).hasMessage("boom!")
    }
  }

        try {
            List<String> results = converter.convert(text, field, "en");
            assertNotNull(results);
        } catch (Exception e) {
            // Expected behavior - null text might cause exception
            assertNotNull(e);
        }
    }

    @Test
    public void testConvertWithWhitespaceText() throws IOException {
        // Test convert with whitespace text

    void addEventMonitor(EventMonitor monitor);

    void dispatchStart(String event, String target);

    void dispatchEnd(String event, String target);

    void dispatchError(String event, String target, Throwable cause);