// Test with cause only
        Exception cause = new IllegalStateException("Underlying error");
        DataStoreException exception = new DataStoreException(cause);

        assertNotNull(exception);
        assertEquals(cause, exception.getCause());
        assertEquals("java.lang.IllegalStateException: Underlying error", exception.getMessage());
        assertTrue(exception instanceof FessSystemException);
    }

   * Returns a collection view of all values associated with a key. If no mappings in the multimap
   * have the provided key, an empty collection is returned.
   *
   * <p>Changes to the returned collection will update the underlying multimap, and vice versa.
   *
   * <p>Because a {@code SortedSetMultimap} has unique sorted values for a given key, this method
   * returns a {@link SortedSet}, instead of the {@link java.util.Collection} specified in the

  /**
   * Invokes with {@code receiver} as 'this' and {@code args} passed to the underlying method and
   * returns the return value; or calls the underlying constructor with {@code args} and returns the
   * constructed instance.
   *
   * @throws IllegalAccessException if this {@code Constructor} object enforces Java language access
   *     control and the underlying method or constructor is inaccessible.

    }

    /**
     * Gets the file of this source.
     *
     * @return The underlying file, never {@code null}.
     * @deprecated Use {@link #getPath()} instead.
     */
    @Deprecated
    public File getFile() {
        return path.toFile();
    }

    /**
     * Gets the file of this source.
     *
     * @return The underlying file, never {@code null}.
     * @since 4.0.0
     */
    public Path getPath() {

/**
 * A <code>URLStreamHandler</code> used to provide NTLM authentication
 * capabilities to the default HTTP handler.  This acts as a wrapper,
 * handling authentication and passing control to the underlying
 * stream handler.
 */
public class Handler extends URLStreamHandler {

    /**
     * The default HTTP port (<code>80</code>).
     */
    public static final int DEFAULT_HTTP_PORT = 80;

    /**

    }

    /**
     * Constructs a new SsoLoginException with the specified detail message and cause.
     *
     * @param message The detail message explaining the SSO login failure
     * @param e The underlying exception that caused this SSO login failure
     */
    public SsoLoginException(final String message, final Exception e) {
        super(message, e);
    }

  @Throws(IOException::class)
  fun writeRequestHeaders(request: Request)

  /** Flush the request to the underlying socket. */
  @Throws(IOException::class)
  fun flushRequest()

  /** Flush the request to the underlying socket and signal no more bytes will be transmitted. */
  @Throws(IOException::class)
  fun finishRequest()

  /**

    /**
     * Constructs a new SSO process exception with the specified detailed message and cause.
     *
     * @param message The detailed error message explaining the cause of the exception
     * @param e The underlying exception that caused this SSO process exception
     */
    public SsoProcessException(final String message, final Exception e) {
        super(message, e);
    }

    /**
     * Creates a {@link NoSuchMethodRuntimeException}.
     *
     * @param targetClass the target class
     * @param methodName the method name
     * @param argTypes the argument types
     * @param cause the underlying exception
     */
    public NoSuchMethodRuntimeException(final Class<?> targetClass, final String methodName, final Class<?>[] argTypes,
            final Throwable cause) {

   */
  Collection<V> get(@ParametricNullness K key);

  /**
   * Returns a view collection of all <i>distinct</i> keys contained in this multimap. Note that the
   * key set contains a key if and only if this multimap maps that key to at least one value.
   *
   * <p>Changes to the returned set will update the underlying multimap, and vice versa. However,