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

    /**
     * is the parameter required?
     * @return <code>true</code> if the Mojo should fail when the parameter cannot be injected
     */
    boolean required() default false;

    /**
     * Specifies that this parameter cannot be configured directly by the user (as in the case of POM-specified

        DEPRECATED_CORE_PARAMETERS = deprecatedCoreParameters;
    }

    @Inject
    DeprecatedCoreExpressionValidator(PluginValidationManager pluginValidationManager) {
        super(pluginValidationManager);
    }

    @Override
    protected String getParameterLogReason(Parameter parameter) {
        return "uses deprecated parameter expression '" + parameter.getDefaultValue() + "': "

            if (properties != null) {
                // We will attempt to get nab a property as a way to specify a parameter
                // to a plugin. My particular case here is allowing the surefire plugin
                // to run a single test so I want to specify that class on the cli as
                // a parameter.

                value = properties.getProperty(expression);
            }

    protected abstract String getParameterLogReason(Parameter parameter);

    protected String formatParameter(Parameter parameter) {
        StringBuilder stringBuilder = new StringBuilder()
                .append("Parameter '")
                .append(parameter.getName())
                .append('\'');

        if (parameter.getExpression() != null) {

    }

    private Stream<String> getParameterNames(Parameter parameter) {
        if (parameter.getAlias() != null) {
            return Stream.of(parameter.getName(), parameter.getAlias());
        } else {
            return Stream.of(parameter.getName());
        }
    }

    private Set<String> getUnknownParameters(MojoExecution mojoExecution, Set<String> parameters) {

            return;
        }

        List<Parameter> invalidParameters = new ArrayList<>();

        for (Parameter parameter : mojoDescriptor.getParameters()) {
            if (!parameter.isRequired()) {
                continue;
            }

            Object value = null;

            PlexusConfiguration config = configuration.getChild(parameter.getName(), false);
            if (config != null) {

                "The parameters " + format(parameters) + " for goal " + mojo.getRoleHint() + " are missing or invalid");

        this.mojo = mojo;

        this.parameters = parameters;
    }

    private static String format(List<Parameter> parameters) {
        StringBuilder buffer = new StringBuilder(128);
        if (parameters != null) {
            for (Parameter parameter : parameters) {

            mojoDescriptor.getParameters().stream()
                    .filter(parameter -> parameter.getDeprecated() != null)
                    .filter(Parameter::isEditable)
                    .forEach(parameter -> checkParameter(
                            mavenSession, mojoDescriptor, mojoClass, parameter, pomConfiguration, expressionEvaluator));
        }
    }

    private void checkParameter(

     * in which case there is one key per sub-directory.
     *
     * <p>This map may contain null values if the constructor was invoked with {@code resolve}
     * parameter set to false. This is more efficient when only the module existence needs to
     * be tested, and module descriptors are not needed.</p>
     *
     * @see #getModuleNames()
     */

    private final Map<String, Parameter> missingParameters;

    ValidatingConfigurationListener(Object mojo, MojoDescriptor mojoDescriptor, ConfigurationListener delegate) {
        this.mojo = mojo;
        this.delegate = delegate;
        this.missingParameters = new HashMap<>();

        if (mojoDescriptor.getParameters() != null) {
            for (Parameter param : mojoDescriptor.getParameters()) {