MavenExecutionRequest mer = new DefaultMavenExecutionRequest();
            invoker.populateRequest(context, new DefaultLookup(container), mer);
            mer = container.lookup(MavenExecutionRequestPopulator.class).populateDefaults(mer);
            return Collections.unmodifiableList(container
                    .lookup(BootstrapCoreExtensionManager.class)
                    .loadCoreExtensions(mer, providedArtifacts, extensions));