private List<Artifact> collectArtifacts(String hint) {
        List<Artifact> artifacts = new ArrayList<>();

        PluginManagement pluginManagement = project.getBuild().getPluginManagement();
        if (pluginManagement != null) {
            artifacts.addAll(getCheckstylePluginDependenciesAsArtifacts(pluginManagement.getPluginsAsMap(), hint));
        }

        artifacts.addAll(
                getCheckstylePluginDependenciesAsArtifacts(project.getBuild().getPluginsAsMap(), hint));

        return artifacts;
    }

    private List<Artifact> getCheckstylePluginDependenciesAsArtifacts(Map<String, Plugin> plugins, String hint) {
        List<Artifact> artifacts = new ArrayList<>();

        Plugin checkstylePlugin = plugins.get(plugin.getGroupId() + ":" + plugin.getArtifactId());
        if (checkstylePlugin != null) {
            for (Dependency dep : checkstylePlugin.getDependencies()) {
                // @todo if we can filter on hints, it should be done here...
                String depKey = dep.getGroupId() + ":" + dep.getArtifactId();
                artifacts.add(plugin.getArtifactMap().get(depKey));
            }
        }
        return artifacts;
    }