*/
  Iterator<EndpointPair<N>> incidentEdgeIterator(N thisNode);

  /**
   * Returns the value associated with the edge connecting the origin node to {@code node}, or null
   * if there is no such edge.
   */
  @CheckForNull
  V value(N node);

  /** Remove {@code node} from the set of predecessors. */
  void removePredecessor(N node);

  /**

  private UncaughtExceptionHandlers() {}

  /**
   * Returns an exception handler that exits the system. This is particularly useful for the main
   * thread, which may start up other, non-daemon threads, but fail to fully initialize the
   * application successfully.
   *
   * <p>Example usage:
   *
   * <pre>
   * public static void main(String[] args) {

    }

    /**
     * @throws Exception
     */
    @Test
    public void testIsAncestor() throws Exception {
        final ClassLoader cl1 = new URLClassLoader(new URL[] { new URL("file:/foo") }, null);
        final ClassLoader cl2 = new URLClassLoader(new URL[] { new URL("file:/bar") }, cl1);
        final ClassLoader cl3 = new URLClassLoader(new URL[] { new URL("file:/baz") }, cl2);

    public int hashCode() {
        return hashCode;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }

        if (!ArtifactModelSource.class.equals(obj.getClass())) {
            return false;
        }

        ArtifactModelSource other = (ArtifactModelSource) obj;

    }

    @Test
    void defaultFs(@TempDir(cleanup = CleanupMode.ON_SUCCESS) Path tempDir) throws Exception {
        invoke(tempDir, Arrays.asList("clean", "verify"));
    }

    @Disabled("Until we move off fully from File")
    @Test
    void jimFs() throws Exception {
        try (FileSystem fs = Jimfs.newFileSystem(Configuration.unix())) {
            invoke(fs.getPath("/"), Arrays.asList("clean", "verify"));
        }
    }

    }

    /**
     * Creates a new settings builder instance.
     *
     * @return The new settings builder instance, never {@code null}.
     */
    public DefaultSettingsBuilder newInstance() {
        return new DefaultSettingsBuilder(
                new org.apache.maven.internal.impl.DefaultSettingsBuilder(),

	for i in $(seq 1 4); do
		"${MINIO[@]}" --address ":$((start_port + i))" ${args[@]} 2>&1 >"${WORK_DIR}/server$i.log" &
	done

	# Wait until all nodes return 403
	for i in $(seq 1 4); do
		while [ "$(curl -m 1 -s -o /dev/null -w "%{http_code}" http://localhost:$((start_port + i)))" -ne "403" ]; do
			echo -n "."
			sleep 1
		done
	done

}

# Prepare fake disks with losetup
function prepare_block_devices() {
	set -e

        DeploymentRegistry registry = getDeploymentRegistry();
        JavaApplicationHandle handle = registry.get(getPath(), JavaApplicationHandle.class);
        if (handle == null) {
            JavaExecHandleBuilder builder = getExecActionFactory().newJavaExec();
            builder.setExecutable(getJavaLauncher().get().getExecutablePath().getAsFile());

        // reformat according to our versioning scheme, since toString() would typically convert 1.0 to 1.0.0
        GradleVersion.version("$major.${minor}${if (micro > 0) ".$micro" else ""}${if (qualifier != null) "-$qualifier" else ""}")

            ?.filter {
                it.name.endsWith(".json")
            }?.associate {
                it to it.readAcceptedChanges()
            }?.filterValues {
                it.acceptedApiChanges != null
            }?.mapValues {
                it.value.acceptedApiChanges!!
            } ?: emptyMap()
    }

    private
    fun File.readAcceptedChanges(): AcceptedApiChanges {