private static ProjectLibrary createProjectLibrary(String name, Iterable<File> jars) {
        ProjectLibrary projectLibrary = new ProjectLibrary();
        projectLibrary.setName(name);
        projectLibrary.setClasses(Sets.newLinkedHashSet(jars));
        return projectLibrary;
    }

    private static ProjectLibrary createScalaSdkLibrary(String name, Iterable<File> jars) {

  The new name better reflects the fact that it also validates artifact transform parameters and other non-property definitions.
- The `ValidateTaskProperties` type is replaced by `ValidatePlugins`.
- The `setClasses()` method is now removed. Use `getClasses().setFrom()` instead.
- The `setClasspath()` method is also removed. use `getClasspath().setFrom()` instead.

            //when the decompiler is registered, for compiled class KtClsFile is created instead of ClsFileImpl
            //and KtFile doesn't return any classes in classOwner.getClasses if there is no KtFileClassProvider
            //but getClasses is used during java resolve, thus it's required to return some PsiClass for such cases
            registerService(KtFileClassProvider::class.java, KtClsFileClassProvider(project))

        ConfigurableFileCollection getClasses();

        RegularFileProperty getOutputFile();

        Property<Boolean> getEnableStricterValidation();

    }

    @Override
    public void execute() {
        List<Problem> taskValidationProblems = new ArrayList<>();

        Params params = getParameters();

            .map(InternalTestSpec.class::cast)
            .allMatch(TestExecutionResultEvaluator::emptyTest);
    }

    private static boolean emptyTest(InternalTestSpec spec) {
        return allEmpty(spec.getClasses(), spec.getMethods().keySet(), spec.getPackages(), spec.getPatterns());
    }

    private static boolean allEmpty(Collection<?>... collections) {
        return Arrays.stream(collections).allMatch(Collection::isEmpty);

        jvmObj.threads = jvmThreadsObj;
        jvmThreadsObj.count = threads.getCount();
        jvmThreadsObj.peak = threads.getPeakCount();
        final Classes classes = jvmStats.getClasses();
        final JvmClassesObj jvmClassesObj = new JvmClassesObj();
        jvmObj.classes = jvmClassesObj;
        jvmClassesObj.loaded = classes.getLoadedClassCount();

            task.setDescription(VALIDATE_PLUGIN_TASK_DESCRIPTION);

            task.getOutputFile().set(project.getLayout().getBuildDirectory().file("reports/plugin-development/validation-report.json"));

            task.getClasses().setFrom((Callable<Object>) () -> extension.getPluginSourceSet().getOutput().getClassesDirs());
            task.getClasspath().setFrom((Callable<Object>) () -> extension.getPluginSourceSet().getCompileClasspath());

                outputClasses = layout.buildDirectory.dir("producerOutput")
            }

            abstract class MyTask extends DefaultTask {
                @Classpath abstract ConfigurableFileCollection getClasses()
                @Inject abstract ProjectLayout getLayout()
                @TaskAction void doStuff() {
                    def root = layout.projectDirectory.asFile
                    classes.files.each { file ->