private String pluginKey;

    public PluginLoaderException(Plugin plugin, String message, ArtifactResolutionException cause) {
        super(message, cause);
        pluginKey = plugin.getKey();
    }

    public PluginLoaderException(Plugin plugin, String message, ArtifactNotFoundException cause) {
        super(message, cause);
        pluginKey = plugin.getKey();
    }

        String pluginKey = pluginKey(pluginArtifact);
        if (validationPluginExcludes(session).contains(pluginKey)) {
            return;
        }
        PluginValidationIssues pluginIssues =
                pluginIssues(session).computeIfAbsent(pluginKey, k -> new PluginValidationIssues());
        pluginIssues.reportPluginIssue(locality, null, issue);

                String pluginKey = getPluginKey(plugin);
                PluginUpgrade upgrade = pluginUpgrades.get(pluginKey);
                if (upgrade != null) {
                    String effectiveVersion = plugin.getVersion();
                    if (isVersionBelow(effectiveVersion, upgrade.minVersion())) {
                        pluginsNeedingUpgrade.add(pluginKey);

            for (Plugin plugin : project.getBuildPlugins()) {
                if (plugin.isExtensions()) {
                    String pluginKey =
                            ArtifactUtils.key(plugin.getGroupId(), plugin.getArtifactId(), plugin.getVersion());

                    if (projectsMap.containsKey(pluginKey)) {
                        LOGGER.warn(

        MavenProject project = new MavenProject(model);

        // The old broken implementation would have done:
        // var plugin = getBuild().getDelegate().getPluginsAsMap().get(pluginKey);
        // return plugin != null ? new Plugin(plugin) : null;
        // This would create a disconnected Plugin that doesn't persist changes.

        // The new fixed implementation does:

                pluginContextsByProjectAndPluginKey.computeIfAbsent(projectKey, k -> new ConcurrentHashMap<>());

        String pluginKey = plugin.getPluginLookupKey();

        return pluginContextsByKey.computeIfAbsent(pluginKey, k -> new ConcurrentHashMap<>());
    }

    public ProjectDependencyGraph getProjectDependencyGraph() {
        return projectDependencyGraph;
    }

            pluginRealms = new HashMap<>();
            project.setContextValue(KEY_EXTENSIONS_REALMS, pluginRealms);
        }

        final String pluginKey = plugin.getId();

        ExtensionRealmCache.CacheRecord extensionRecord = pluginRealms.get(pluginKey);
        if (extensionRecord != null) {
            return extensionRecord;
        }

    public String getDefaultGoal() {
        return getBuild() != null ? getBuild().getDefaultGoal() : null;
    }

    public Plugin getPlugin(String pluginKey) {
        org.apache.maven.api.model.Plugin plugin =
                getBuild().getDelegate().getPluginsAsMap().get(pluginKey);
        return plugin != null ? new Plugin(plugin, getBuild()) : null;
    }

    /**
     * Default toString
     */

                org.eclipse.aether.graph.Dependency pluginDep =
                        RepositoryUtils.toDependency(dependency, session.getArtifactTypeRegistry());
                if (!DependencyScope.SYSTEM.is(pluginDep.getScope())) {
                    pluginDep = pluginDep.setScope(DependencyScope.RUNTIME.id());
                }
                request.addDependency(pluginDep);
            }