*
 * <p>Except for logically "abstract" types like {@code ImmutableCollection} itself, each {@code
 * Immutable} type provides the static operations you need to obtain instances of that type. These
 * usually include:
 *
 * <ul>
 *   <li>Static methods named {@code of}, accepting an explicit list of elements or entries.
 *   <li>Static methods named {@code copyOf} (or {@code copyOfSorted}), accepting an existing

      @Override
      public Set<N> adjacentNodes(N node) {
        return AbstractValueGraph.this.adjacentNodes(node);
      }

      @Override
      public Set<N> predecessors(N node) {
        return AbstractValueGraph.this.predecessors(node);
      }

      @Override
      public Set<N> successors(N node) {
        return AbstractValueGraph.this.successors(node);
      }

      @Override

 *
 * <p>This class does <i>not</i> forward the {@code hashCode} and {@code equals} methods through to
 * the backing object, but relies on {@code Object}'s implementation. This is necessary to preserve
 * the symmetry of {@code equals}. Custom definitions of equality are usually based on an interface,
 * such as {@code Set} or {@code List}, so that the implementation of {@code equals} can cast the

     * Do not instantiate.
     */
    protected ZipFileUtil() {
    }

    /**
     * Creates and returns a <code>ZipFile</code> for reading the specified Zip file.
     *
     * @param file
     *            File path. Must not be {@literal null} or an empty string.
     * @return A <code>ZipFile</code> for reading the specified Zip file.
     */
    public static ZipFile create(final String file) {

public class InvokerException extends MavenException {
    /**
     * Constructs a new {@code InvokerException} with the specified detail message.
     *
     * @param message the detail message explaining the cause of the exception
     */
    public InvokerException(@Nullable String message) {
        super(message);
    }

    /**
     * Constructs a new {@code InvokerException} with the specified detail message and cause.
     *

     *
     * @param method
     *            The method. Cannot be {@literal null}
     * @return <code>static</code> if the method is static
     */
    public static boolean isStatic(final Method method) {
        assertArgumentNotNull("method", method);

        return Modifier.isStatic(method.getModifiers());
    }

    /**
     * Returns whether the method is <code>final</code>.
     *

 *     <li><code>alpha</code> or <code>a</code></li>
 *     <li><code>beta</code> or <code>b</code></li>
 *     <li><code>milestone</code> or <code>m</code></li>
 *     <li><code>rc</code> or <code>cr</code></li>
 *     <li><code>snapshot</code></li>
 *     <li><code>ga</code> or <code>final</code></li>
 *     <li><code>sp</code></li>
 *     </ol>

  public N removeOutEdge(E edge) {
    N node = super.removeOutEdge(edge);
    Multiset<N> adjacentNodes = getReference(adjacentNodesReference);
    if (adjacentNodes != null) {
      checkState(adjacentNodes.remove(node));
    }
    return node;
  }

  @Override
  public void addInEdge(E edge, N node, boolean isSelfLoop) {
    if (!isSelfLoop) {
      addOutEdge(edge, node);
    }
  }

  @Override

                .get(stream -> stream.map(String::trim).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
        nodeManager = new NodeManager(hosts, node -> request(new CurlRequest(Method.GET, node.getUrl("/"))));
        nodeManager.setHeartbeatInterval(fessConfig.getFesenHeartbeatInterval());
    }

    /**
     * Creates a GET request for the specified path.

        return flags;
    }

    /**
     * Gets the new node address.
     *
     * @return the new node address
     */
    public String getNewNodeAddress() {
        return newNodeAddress;
    }

    /**
     * Sets the new node address.
     *
     * @param newNodeAddress the new node address
     */
    public void setNewNodeAddress(String newNodeAddress) {