if (build != null) {
                validate20RawPlugins(problems, build.getPlugins(), "build.plugins.plugin.", EMPTY, request);

                PluginManagement mgmt = build.getPluginManagement();
                if (mgmt != null) {
                    validate20RawPlugins(
                            problems, mgmt.getPlugins(), "build.pluginManagement.plugins.plugin.", EMPTY, request);
                }
            }

        // =============================================
        assertEquals("||${project.basedir}||", originalModel.getProperties().get("prop-outside"));

        List<Plugin> outsidePlugins = originalModel.getBuild().getPlugins();
        assertEquals(1, outsidePlugins.size());

        checkBuildPluginWithArtifactId(
                outsidePlugins,
                "plugin-all-profiles",
                "Outside ||${project.basedir}||",

            // pluginArtifacts
            Set<Artifact> pluginArtifacts = new HashSet<>();
            for (Plugin plugin : project.getModel().getDelegate().getBuild().getPlugins()) {
                Artifact artifact = repositorySystem.createPluginArtifact(new org.apache.maven.model.Plugin(plugin));

                if (artifact != null) {
                    pluginArtifacts.add(artifact);

                        .collect(Collectors.toSet());
                for (BuildStep step : planSteps) {
                    MavenProject project = step.project;
                    for (Plugin plugin : project.getBuild().getPlugins()) {
                        for (PluginExecution execution : plugin.getExecutions()) {
                            for (String goal : execution.getGoals()) {

            Model model = lineage.get(i).getModel();
            Build build = model.getBuild();
            if (build != null) {
                for (Plugin plugin : build.getPlugins()) {
                    String key = plugin.getKey();
                    if (versions.get(key) == null) {
                        versions.put(key, plugin.getVersion());
                        plugins.put(key, plugin);

    public List<Plugin> getBuildPlugins() {
        if (getModel().getBuild() == null) {
            return Collections.emptyList();
        }
        return Collections.unmodifiableList(getModel().getBuild().getPlugins());
    }

    public List<String> getModules() {
        if (!getModel().getDelegate().getSubprojects().isEmpty()) {
            return getModel().getDelegate().getSubprojects();
        }