throw new IllegalStateException();
    }

    @Override
    public List<Project> getProjects() {
        return List.of();
    }

    @Override
    public Map<String, Object> getPluginContext(Project project) {
        throw new UnsupportedInStandaloneModeException();
    }

    static class Providers {

        @Provides
        @SuppressWarnings("unused")

     * <strong>Implementation note:</strong> while this method return type is {@link Map}, the returned map instance
     * implements {@link ConcurrentMap} as well.
     *
     */
    public Map<String, Object> getPluginContext(PluginDescriptor plugin, MavenProject project) {
        String projectKey = project.getId();

        ConcurrentMap<String, ConcurrentMap<String, Object>> pluginContextsByKey =

     *
     * @throws org.apache.maven.api.services.MavenException if not called from the within a mojo execution
     */
    @Nonnull
    Map<String, Object> getPluginContext(@Nonnull Project project);

    /**
     * Retrieves the service for the interface
     *
     * @throws NoSuchElementException if the service could not be found
     */
    @Nonnull