final String error = getValidationError();
        if (!Strings.isNullOrEmpty(error)) {
            throw new IllegalArgumentException(error);
        }

        final Deferred<T> deferred = new Deferred<>();
        try {
            processRequest(client, deferred);
        } catch (final Exception e) {
            throw new SuggesterException("Failed to execute request: " + getClass().getSimpleName(), e);
        }

    if (localValue == null | localValue instanceof DelegatingToFuture) {
      throw new IllegalStateException("Task has not completed");
    }
    if (localValue instanceof Failure) {
      throw new IllegalStateException("Task completed with exception");
    }
    if (localValue instanceof Cancellation) {
      throw new IllegalStateException("Task was cancelled");
    }
    if (localValue == NULL) {

    }

    @Test
    public void test_throwAndCatch() {
        // Test throwing and catching PluginException
        String expectedMessage = "Plugin loading failed";

        try {
            throw new PluginException(expectedMessage);
        } catch (PluginException e) {
            assertEquals(expectedMessage, e.getMessage());
            assertNull(e.getCause());
        }
    }

    @Test

        val protocolString = Platform.get().getSelectedProtocol(sslSocket)
        val protocol = if (protocolString != null) get(protocolString) else null
        if (protocol != Protocol.HTTP_2) {
          throw ProtocolException("Protocol $protocol unsupported")
        }
        val connection =
          Http2Connection
            .Builder(false, TaskRunner.INSTANCE)

  private File getTestDir() throws IOException {
    if (testDir != null) {
      return testDir;
    }

    URL testFileUrl = IoTestCase.class.getResource("testdata/i18n.txt");
    if (testFileUrl == null) {
      throw new RuntimeException("unable to locate testdata directory");
    }

    if (testFileUrl.getProtocol().equals("file")) {
      try {
        File testFile = new File(testFileUrl.toURI());

        final int len = super.encode(dst, dstIndex);
        final int exp = size();
        final int actual = getLength();
        if (exp != actual) {
            // Log the size mismatch for debugging but don't throw exception
            // This can occur due to padding alignment differences between size8() and pad8()
            if (log.isDebugEnabled()) {

      join();
    } catch (ReflectiveOperationException e) {
      // stop() threw or did not exist. Don't join() the thread, which might hang forever.
    }

    if (uncaughtThrowable != null) {
      throw new AssertionError("Uncaught throwable in " + getName(), uncaughtThrowable);
    }
  }

  /**
   * Causes this thread to call the named void method, and asserts that the call returns normally.
   */

                }
                if (!foundKerberos) {
                    throw new SmbUnsupportedOperationException("Server does not support kerberos authentication");
                }
            }
        } catch (SmbException e) {
            throw e;
        } catch (IOException e1) {
            log.debug("Ignoring invalid initial token", e1);
        }

        try {

            } finally {
                CloseableUtil.close(ois);
            }
        } catch (final IOException ex) {
            throw new IORuntimeException(ex);
        } catch (final ClassNotFoundException ex) {
            throw new ClassNotFoundRuntimeException(ex);
        }
    }

    /**
     * Creates a permissive filter that allows all classes to be deserialized.
     * <p>

    this.iterator = iterator;
  }

  @Override
  public Iterator<E> iterator() {
    if (iterator == null) {
      // TODO: throw something else? Do we worry that people's code and tests
      // might be relying on this particular type of exception?
      throw new IllegalStateException();
    }
    try {
      return iterator;
    } finally {
      iterator = null;
    }
  }