return new UpgradeContext(
                invokerRequest, (UpgradeOptions) invokerRequest.options().orElse(null));
    }

    @Override
    protected void lookup(UpgradeContext context) throws Exception {
        if (context.goals == null) {
            super.lookup(context);
            context.goals = context.lookup.lookupMap(Goal.class);
        }
    }

    @Override

    Set<CombinedInterface> getSetProp() { return null; }

    Map<CombinedInterface, JavaClassWithParameterizedTypes> getMapProp() { return null; }

    List<?> getWildcardProp() { return null; }

    List<? extends CombinedInterface> getUpperBoundProp() { return null; }

    List<? super CombinedInterface> getLowerBoundProp() { return null; }

    public String toString() {
        return "[" + (md == null ? "no metadata" : md.toString()) + "]";
    }

    // ---------------------------------------------------------------------
    private static int compareStrings(String s1, String s2) {
        if (s1 == null && s2 == null) {
            return 0;
        }

        if (s1 == null /* && s2 != null */) {
            return -1;
        }

        if (

                    if (pluginMgmt != null) {
                        for (Plugin managedPlugin : pluginMgmt.getPlugins()) {
                            Object key = getPluginKey(managedPlugin);
                            Plugin addedPlugin = added.get(key);
                            if (addedPlugin != null) {
                                Plugin plugin = managedPlugin.clone();

                org.eclipse.aether.artifact.Artifact resolverArtifact = RepositoryUtils.toArtifact(artifact);
                return resolverArtifact != null ? session.getArtifact(resolverArtifact) : null;
            }

            @Override
            public Map<String, Dependency> getDependenciesMap() {
                DependencyNode resolverNode =

    /**
     * Builds the effective toolchains of the specified toolchains files.
     *
     * @param request The toolchains building request that holds the parameters, must not be {@code null}.
     * @return The result of the toolchains building, never {@code null}.
     * @throws ToolchainsBuildingException If the effective toolchains could not be built.
     */

import java.util.stream.Collectors;

class CoreUtils {

    public static <T> T cast(Class<T> clazz, Object o, String name) {
        if (!clazz.isInstance(o)) {
            if (o == null) {
                throw new IllegalArgumentException(name + " is null");
            }
            throw new IllegalArgumentException(name + " is not an instance of " + clazz.getName());
        }
        return clazz.cast(o);
    }

        if (config == null) {
            return false;
        }

        // there are sub items ... so configuration is declared
        if (config.getChildCount() > 0) {
            return true;
        }

        String strValue = config.getValue();

        if (strValue == null || strValue.isEmpty()) {
            return false;
        }

     *
     * @param request The request that holds the details about the plugin and the repositories to consult, must not be
     *            {@code null}.
     * @return The result of the prefix resolution, never {@code null}.
     * @throws NoPluginFoundForPrefixException If the plugin prefix could not be resolved.
     */

    }

    int getId() {
        return id;
    }

    /**
     * Helper method to simplify null processing
     *
     * @param scope a scope or {@code null}
     * @return the provided scope or DEFAULT_SCOPE
     */
    public static ArtifactScopeEnum checkScope(ArtifactScopeEnum scope) {
        return scope == null ? DEFAULT_SCOPE : scope;
    }

    /**
     *