/>
  </extensionPoints>

  <extensions defaultExtensionNs="com.intellij">
    <projectService serviceImplementation="org.jetbrains.kotlin.resolve.jvm.KotlinJavaPsiFacade"/>

    <projectService
        serviceInterface="org.jetbrains.kotlin.load.java.structure.impl.source.JavaElementSourceFactory"
        serviceImplementation="org.jetbrains.kotlin.analysis.api.impl.base.java.source.JavaElementSourceWithSmartPointerFactory"
    />

        serviceInterface="org.jetbrains.kotlin.analysis.api.session.KaSessionProvider"
        serviceImplementation="org.jetbrains.kotlin.analysis.api.descriptors.KaFe10SessionProvider"
    />

    <projectService
        serviceInterface="org.jetbrains.kotlin.idea.references.KotlinReferenceProviderContributor"
        serviceImplementation="org.jetbrains.kotlin.references.fe10.base.KtFe10KotlinReferenceProviderContributor"
    />

        kotlinCoreProjectEnvironment.project.apply {
            registerService(serviceInterface, serviceImplementation)
        }
    }

    public fun <T : Any> registerProjectService(serviceImplementation: Class<T>) {
        kotlinCoreProjectEnvironment.project.apply {
            registerService(serviceImplementation)
        }
    }

        serviceInterface="org.jetbrains.kotlin.analysis.api.session.KaSessionProvider"
        serviceImplementation="org.jetbrains.kotlin.analysis.api.fir.KaFirSessionProvider"
    />

    <projectService
        serviceInterface="org.jetbrains.kotlin.idea.references.KotlinReferenceProviderContributor"
        serviceImplementation="org.jetbrains.kotlin.analysis.api.fir.references.KotlinFirReferenceContributor"
    />

        given:
        serviceImplementation()
        adhocTaskUsingUndeclaredService(null)

        when:
        succeeds 'broken'

        then:
        outputDoesNotContain "'Task#usesService'"
    }

    def "does nag when service is used by task without a corresponding usesService call and feature preview is enabled"() {
        given:
        serviceImplementation()
        adhocTaskUsingUndeclaredService(1)

            implementationsOf(serviceType, classLoader),
            new Function<Class<? extends T>, T>() {
                @Override
                public T apply(Class<? extends T> serviceImplementation) {
                    return instantiator.newInstance(serviceImplementation);
                }
            });
    }

    private <T> List<Class<? extends T>> implementationsOf(Class<T> serviceType, ClassLoader classLoader) {

  <extensions defaultExtensionNs="com.intellij">
    <projectService
        serviceInterface="org.jetbrains.kotlin.analysis.api.platform.declarations.KotlinDirectInheritorsProvider"
        serviceImplementation="org.jetbrains.kotlin.analysis.api.standalone.base.declarations.KotlinStandaloneFirDirectInheritorsProvider"
    />
  </extensions>

        for (serviceDescriptor in pluginDescriptor.containerDescriptor().services) {
            val serviceImplementationClass = loadClass(serviceDescriptor.serviceImplementation, fakePluginDescriptor)
            val serviceInterface = serviceDescriptor.serviceInterface
            if (serviceInterface != null) {