throw new IllegalArgumentException("reader or inputStream must be non null");
        }
        try {
            InputSource source = null;
            if (request.getModelId() != null || request.getLocation() != null) {
                source = new InputSource(request.getModelId(), request.getLocation());
            }
            MavenToolchainsStaxReader xml = new MavenToolchainsStaxReader();

            throw new IllegalArgumentException("reader or inputStream must be non null");
        }
        try {
            InputSource source = null;
            if (request.getModelId() != null || request.getLocation() != null) {
                source = new InputSource(request.getModelId(), request.getLocation());
            }
            MavenToolchainsStaxReader xml = new MavenToolchainsStaxReader();

    }

    /**
     * DuplicateMerger
     */
    protected static class DuplicateMerger extends MavenModelMerger {

        public Plugin mergePlugin(Plugin target, Plugin source) {
            return super.mergePlugin(target, source, false, Collections.emptyMap());
        }
    }

    @Override
    public Model injectDefaultValues(Model model, ModelBuilderRequest request, ModelProblemCollector problems) {

            }

            return null;
        }
    }

    /**
     * Wraps an arbitrary object with an {@link ObjectBasedValueSource} instance, then
     * wraps that source with a {@link PrefixedValueSourceWrapper} instance, to which
     * this class delegates all of its calls.
     */
    public static class PrefixedObjectValueSource extends AbstractDelegatingValueSource

    Object getConfiguration();

    /**
     * Sets the configuration to unmarshal into the bean. The configuration should be taken from
     * {@link org.apache.maven.model.ConfigurationContainer#getConfiguration()} or a similar source.
     * Fully equivalent to {@code setConfiguration(configuration, null)}.
     *
     * @param configuration The configuration to unmarshal, may be {@code null}.
     * @return This request for chaining, never {@code null}.

// wiring and reference and external source for the lifecycle configuration.
@Named
@Singleton
public class DefaultLifecycles {
    public static final String[] STANDARD_LIFECYCLES = {"clean", "default", "site", "wrapper"};

    private final Logger logger = LoggerFactory.getLogger(getClass());

    // @Configuration(source="org/apache/maven/lifecycle/lifecycles.xml")

    private final Lookup lookup;

/**
 * Information about the modules contained in a path element.
 * The path element may be a JAR file or a directory. Directories may use either package hierarchy
 * or module hierarchy, but not module source hierarchy. The latter is excluded because this class
 * is for path elements of compiled codes.
 */
class PathModularization {
    /**
     * A unique constant for all non-modular dependencies.
     */

Copyright (c) 2008 FasterXML LLC ******@****.***

    // default source for this profile is in the pom itself.
    private String source = SOURCE_POM;

    public void setSource(String source) {
        this.source = source;
    }

    public String getSource() {
        return source;
    }

    /**
     * @see java.lang.Object#toString()
     */
    public String toString() {

        return activeProfiles;
    }

    public void setInjectedProfileIds(String source, List<String> injectedProfileIds) {
        if (injectedProfileIds != null) {
            this.injectedProfileIds.put(source, new ArrayList<>(injectedProfileIds));
        } else {
            this.injectedProfileIds.remove(source);
        }
    }

    /**