return vcsUrl;
    }

    /**
     * Returns the declared plugins.
     *
     * @return the declared plugins, never null
     */
    public NamedDomainObjectContainer<PluginDeclaration> getPlugins() {
        return plugins;
    }

    /**
     * Configures the declared plugins.
     *
     * @param action the configuration action to invoke on the plugins
     */

        assertEquals("4.0.0", project4.getModelVersion());

        Build build = project4.getBuild();
        List<Plugin> plugins = build.getPlugins();

        Map<String, Integer> validPluginCounts = new HashMap<>();

        String testPluginArtifactId = "maven-compiler-plugin";

        // this is the plugin we're looking for.

    private final ScalaPlugin scalaPlugin = TestUtil.newInstance(ScalaPlugin)

    def appliesTheJavaPluginToTheProject() {
        when:
        scalaPlugin.apply(project)

        then:
        project.getPlugins().hasPlugin(JavaPlugin)
    }

    def addsScalaConventionToEachSourceSetAndAppliesMappings() {
        when:
        scalaPlugin.apply(project)

        then:
        def sourceSet = project.sourceSets.main

            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);
                }
            }

        return versions.values();
    }

    public Collection<LibraryEntry> getLibraries() {
        return libraries.values();
    }

    public Collection<PluginEntry> getPlugins() {
        return plugins.values();
    }

    public String registerLibrary(String module, String version) {
        String alias = fullyQualifiedAliases ? coordinatesToAlias(module) : moduleToAlias(module);

        updateDocumentationExtension(project, documentationExtension);
        configurePlugin(project, documentationExtension);
    }

    private static void applyPlugin(Project project) {
        project.getPlugins().apply(DokkatooHtmlPlugin.class);
    }

    private static void updateDocumentationExtension(Project project, GradleDocumentationExtension extension) {

            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);
                }
            }

        final WarPluginConvention pluginConvention = objectFactory.newInstance(org.gradle.api.plugins.internal.DefaultWarPluginConvention.class, project);
        DeprecationLogger.whileDisabled(() -> project.getConvention().getPlugins().put("war", pluginConvention));
        return pluginConvention;
    }

    /**
     * This method is intended for internal use and should not be called.
     *

        }

        @Override
        public boolean isOffline() {
            return !includeLibraries();
        }

        private boolean includeLibraries() {
            return !project.getPlugins().hasPlugin(JavaPlugin.class);
        }

        @Override
        public boolean downloadSources() {
            return false;
        }

        @Override

                    }
                });
            }
        });
    }

    @SuppressWarnings("rawtypes")
    protected void withBasePlugin(Action<Plugin> action) {
        project.getPlugins().withType(getBasePlugin(), action);
    }

    protected JavaPluginExtension getJavaPluginExtension() {
        return project.getExtensions().getByType(JavaPluginExtension.class);
    }

    @Inject