assertEquals("maven-it-plugin-a", pom.getValue("build/plugins[1]/artifactId"));
        assertEquals(1, ((List<?>) pom.getValue("build/plugins[1]/executions")).size());
        assertEquals("maven-it-plugin-b", pom.getValue("build/plugins[2]/artifactId"));
        assertEquals(1, ((List<?>) pom.getValue("build/plugins[1]/executions")).size());

        if (getBuildPlugins() != null) {
            for (Plugin plugin : getBuildPlugins()) {
                if (pluginGroupId.equals(plugin.getGroupId()) && pluginArtifactId.equals(plugin.getArtifactId())) {
                    dom = (Xpp3Dom) plugin.getConfiguration();

                    if (executionId != null) {
                        for (PluginExecution execution : plugin.getExecutions()) {

                    if (versions.get(key) == null) {
                        versions.put(key, plugin.getVersion());
                        plugins.put(key, plugin);
                    }
                }
                PluginManagement mgmt = build.getPluginManagement();
                if (mgmt != null) {
                    for (Plugin plugin : mgmt.getPlugins()) {
                        String key = plugin.getKey();

            List<Plugin> plugins,
            String prefix,
            String prefix2,
            ModelBuilderRequest request) {
        Severity errOn31 = getSeverity(request, ModelBuilderRequest.VALIDATION_LEVEL_MAVEN_3_1);

        Map<String, Plugin> index = new HashMap<>();

        for (Plugin plugin : plugins) {
            if (plugin.getGroupId() == null

            // 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);
                }
            }

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