PluginContainer target, PluginContainer source, boolean sourceDominant, Map<Object, Object> context) {
            List<Plugin> src = source.getPlugins();
            if (!src.isEmpty()) {
                List<Plugin> tgt = target.getPlugins();
                Map<Object, Plugin> master = new LinkedHashMap<>(src.size() * 2);

                for (Plugin element : src) {

        // one by one, and try to find a matching prefix.
        if (result == null && build != null) {
            result = resolveFromProject(request, build.getPlugins());
            if (result == null && management != null) {
                result = resolveFromProject(request, management.getPlugins());
            }
        }

        if (result == null) {
            throw new NoPluginFoundForPrefixException(

            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);
                }
            }

                + "      </plugin>\n"
                + "    </plugins>\n"
                + "  </build>\n"
                + "</project>";

        Model model = fromXml(xml);
        Plugin plugin = model.getBuild().getPlugins().get(0);
        XmlNode node = plugin.getConfiguration();
        assertNotNull(node);
        assertEquals("http://maven.apache.org/POM/4.0.0", node.namespaceUri());
        assertEquals("m", node.prefix());

                "Version change should persist - this verifies the plugin is connected to the model");

        // Also verify the change is reflected in the build plugins list
        Plugin pluginFromBuildList = project.getBuild().getPlugins().stream()
                .filter(p -> "org.apache.maven.plugins:maven-compiler-plugin".equals(p.getKey()))
                .findFirst()
                .orElse(null);

        // =============================================
        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}||",

        Build build = effectiveModel.getBuild();
        if (build != null) {
            // Check build/plugins - these are the actual plugins used in the build
            for (Plugin plugin : build.getPlugins()) {
                String pluginKey = getPluginKey(plugin);
                PluginUpgrade upgrade = pluginUpgrades.get(pluginKey);
                if (upgrade != null) {

                        .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()) {

            // 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);

                descriptor.setRequiredMavenVersion(artifact.getProperty("requiredMavenVersion", null));
            }

            return descriptor;
        });

        pluginDescriptor.setPlugin(plugin);

        return pluginDescriptor;
    }

    private PluginDescriptor extractPluginDescriptor(Artifact pluginArtifact, Plugin plugin)