*/
@Deprecated(since = "4.0.0")
class DefaultTransformerContext implements TransformerContext {
    final ModelLocator modelLocator;

    final Map<String, String> userProperties = new ConcurrentHashMap<>();

    final Map<Path, Holder> modelByPath = new ConcurrentHashMap<>();

    final Map<GAKey, Holder> modelByGA = new ConcurrentHashMap<>();

    public static class Holder {

     * on his discretion, e.g. via the {@code -Dkey=value} parameter on the command line.
     *
     * @param userProperties The user properties, may be {@code null}.
     * @return This request, never {@code null}.
     */
    SettingsBuildingRequest setUserProperties(Properties userProperties);

                context.parserRequest,
                context.cwd,
                context.installationDirectory,
                context.userHomeDirectory,
                context.userProperties,
                context.systemProperties,
                context.topDirectory,
                context.rootDirectory,
                context.parserRequest.in(),
                context.parserRequest.out(),

        container.setLoggerManager(createLoggerManager());
        R invokerRequest = context.invokerRequest;
        Function<String, String> extensionSource = expression -> {
            String value = invokerRequest.userProperties().get(expression);
            if (value == null) {
                value = invokerRequest.systemProperties().get(expression);
            }
            return value;
        };

                .toString());

        MavenOptions mavenOptions = invokerRequest.options();
        if (mavenOptions.userProperties().isPresent()) {
            for (Map.Entry<String, String> entry :
                    mavenOptions.userProperties().get().entrySet()) {
                cmdAndArguments.add("-D" + entry.getKey() + "=" + entry.getValue());
            }
        }

    protected LayeredOptions(List<O> options) {
        this.options = new ArrayList<>(options);
    }

    @Override
    public Optional<Map<String, String>> userProperties() {
        return collectMapIfPresentOrEmpty(Options::userProperties);
    }

    @Override
    public String source() {
        return String.format(
                "layered(%s)", options.stream().map(Options::source).toList());
    }

                context.parserRequest,
                context.cwd,
                context.installationDirectory,
                context.userHomeDirectory,
                context.userProperties,
                context.systemProperties,
                context.topDirectory,
                context.rootDirectory,
                context.parserRequest.in(),
                context.parserRequest.out(),

        data.put("plexus", container);
        data.put("workingDirectory", cliRequest.workingDirectory);
        data.put("systemProperties", cliRequest.systemProperties);
        data.put("userProperties", cliRequest.userProperties);
        data.put("versionProperties", CLIReportingUtils.getBuildProperties());
        eventSpyDispatcher.init(eventSpyContext);

        // refresh logger in case container got customized by spy

     * These properties can be set using the -D command-line option.
     *
     * @return an unmodifiable map of user properties
     */
    @Nonnull
    Map<String, String> userProperties();

    /**
     * Returns a map of system properties for the Maven execution.
     * These include both Java system properties and Maven-specific system properties.
     *

                context.parserRequest,
                context.cwd,
                context.installationDirectory,
                context.userHomeDirectory,
                context.userProperties,
                context.systemProperties,
                context.topDirectory,
                context.rootDirectory,
                context.parserRequest.in(),
                context.parserRequest.out(),