// ------------------------------------------------------------------------
        // Local Repository
        //
        // 1. Use a value has been passed in via the configuration
        // 2. Use value in the resultant settings
        // 3. Use default value
        // ------------------------------------------------------------------------

        if (request.getLocalRepository() == null) {

     * @return the type
     */
    @Nonnull
    @Override
    default Type require(@Nonnull String id) {
        return lookup(id).orElseThrow(() -> new IllegalArgumentException("Unknown extensible enum value '" + id + "'"));
    }

    String findTool(String toolName);

    /**
     * Let the toolchain decide if it matches requirements defined
     * in the toolchain plugin configuration.
     * @param requirements Map<String, String> key value pair, may not be {@code null}
     * @return {@code true} if the requirements match, otherwise {@code false}
     */
    boolean matchesRequirements(Map<String, String> requirements);

     */
    private static Path createPathProxy(String value) {
        return (Path) Proxy.newProxyInstance(
                ExclusionArtifactFilter.class.getClassLoader(), new Class[] {Path.class}, (proxy1, method, args) -> {
                    if ("toString".equals(method.getName())) {
                        return value;
                    }
                    throw new UnsupportedOperationException();

        projects = segmentChunks.iterator();
        for (ProjectSegment segmentChunk : segmentChunks) {
            final ByteArrayOutputStream value = new ByteArrayOutputStream();
            streams.put(segmentChunk, value);
            printStreams.put(segmentChunk, new PrintStream(value));
        }
        setNext();
        this.originalSystemOUtStream = originalSystemOut;

     * We want to make sure that what is ask for in the execution request overrides what is in the settings.
     * The CLI feeds into an execution request so if a particular value is present in the execution request
     * then we will take that over the value coming from the user settings.
     */
    private static Settings adaptSettings(MavenExecutionRequest request) {
        File localRepo = request.getLocalRepositoryPath();

     */
    @Nonnull
    String name() default "";

    /**
     * alias supported to get parameter value.
     * @return the alias
     */
    @Nonnull
    String alias() default "";

    /**
     * Property to use to retrieve a value. Can come from <code>-D</code> execution, setting properties or pom
     * properties.
     * @return property name
     */
    @Nonnull

    /**
     * Gets the user properties to use for interpolation and profile activation. The user properties have been
     * configured directly by the user on his discretion, e.g. via the {@code -Dkey=value} parameter on the command
     * line.
     *
     * @return The user properties, never {@code null}.
     */
    Map<String, String> getUserProperties();

    /**

    private Properties convertToProperties(final BuildResumptionData buildResumptionData) {
        Properties properties = new Properties();

        String value = String.join(PROPERTY_DELIMITER, buildResumptionData.getRemainingProjects());
        properties.setProperty(REMAINING_PROJECTS, value);

        return properties;
    }

    @Override
    public void applyResumptionData(MavenExecutionRequest request, MavenProject rootProject) {

          </excludes>
          <systemProperties>
            <property>
              <name>JAVA_HOME</name>
              <value>${JAVA_HOME}</value>
            </property>
            <property>
              <name>M2_HOME</name>
              <value>${M2_HOME}</value>
            </property>
          </systemProperties>
        </configuration>
      </plugin>
    </plugins>
  </build>
  <scm>