mojoDescriptor.setPluginDescriptor(pluginDescriptor);

        Parameter parameter = new Parameter();
        parameter.setType("java.lang.String[]");
        parameter.setName("toAddresses");

        parameter.setRequired(true);

        PluginParameterException exception =
                new PluginParameterException(mojoDescriptor, Collections.singletonList(parameter));

        assertEquals(

    public Parameter() {}

    public Parameter(org.apache.maven.api.plugin.descriptor.Parameter p) {
        this.setAlias(p.getAlias());
        this.setName(p.getName());
        this.setRequired(p.isRequired());
        this.setEditable(p.isEditable());
        this.setDescription(p.getDescription());
        this.setExpression(p.getExpression());
        this.setDeprecated(p.getDeprecated());

            parameter.setType(d.getChild("type").getValue());

            String required = d.getChild("required").getValue();

            parameter.setRequired(Boolean.parseBoolean(required));

            PlexusConfiguration editableConfig = d.getChild("editable");

            // we need the null check for pre-build legacy plugins...