application.apply {
            registerFileDocumentManager()

            registerService(IndentHelper::class.java, MockIndentHelper::class.java)

            CoreApplicationEnvironment.registerExtensionPoint(
                extensionArea,
                DocumentWriteAccessGuard.EP_NAME,
                MockDocumentWriteAccessGuard::class.java,
            )
        }
    }

    /**

    }

    override fun registerProjectExtensionPoints(project: MockProject, testServices: TestServices) {
        AnalysisHandlerExtension.registerExtensionPoint(project)
        PluginStructureProvider.registerProjectExtensionPoints(project, PLUGIN_RELATIVE_PATH)
    }

    override fun registerProjectServices(project: MockProject, testServices: TestServices) {

        for (extensionPointDescriptor in pluginDescriptor.projectContainerDescriptor.extensionPoints.orEmpty()) {
            CoreApplicationEnvironment.registerExtensionPoint(
                project.extensionArea,
                extensionPointDescriptor.name,
                project.loadClass<Any>(extensionPointDescriptor.className, fakePluginDescriptor),
            )
        }

            registerService(serviceImplementation)
        }
    }

    public fun <T : Any> registerProjectExtensionPoint(extensionDescriptor: ProjectExtensionDescriptor<T>) {
        extensionDescriptor.registerExtensionPoint(project)
    }

    private fun registerProjectServices(
        sourceKtFiles: List<KtFile>,
        packagePartProvider: (GlobalSearchScope) -> PackagePartProvider,
    ) {

        // TODO: rewrite KtResolveExtensionProviderForTest to avoid KtResolveExtensionProvider access before initialized project
        @Suppress("UnstableApiUsage")
        CoreApplicationEnvironment.registerExtensionPoint(
            project.extensionArea,
            KaResolveExtensionProvider.EP_NAME.name,
            KaResolveExtensionProvider::class.java
        )
    }