List<String> getPluginGroups();

    MavenExecutionRequest setPluginGroups(List<String> pluginGroups);

    MavenExecutionRequest addPluginGroup(String pluginGroup);

    MavenExecutionRequest addPluginGroups(List<String> pluginGroups);

    boolean isProjectPresent();

    MavenExecutionRequest setProjectPresent(boolean isProjectPresent);

    File getUserSettingsFile();

        if (!getPluginGroups().contains(pluginGroup)) {
            getPluginGroups().add(pluginGroup);
        }

        return this;
    }

    @Override
    public MavenExecutionRequest addPluginGroups(List<String> pluginGroups) {
        for (String pluginGroup : pluginGroups) {
            addPluginGroup(pluginGroup);
        }

        return this;
    }

    @Override