return Collections.emptySet();
        }
        return javaSourceSets.getByName(SourceSet.MAIN_SOURCE_SET_NAME)
            .getOutput()
            .getClassesDirs()
            .getAsFileTree()
            .getFiles()
            .stream()
            .filter(file -> file.getName().endsWith(".class"))
            .map(File::getName)
            .map(name -> name.substring(0, name.length() - 6))

    @TaskAction
    public void checkDeadLinks() {
        Map<File, List<Error>> errors = new TreeMap<>();

        gatherDeadLinksInFileReleaseNotes(errors);

        getDocumentationRoot().getAsFileTree().matching(pattern -> pattern.include("**/*.adoc")).forEach(file -> {
            gatherDeadLinksInFile(file, errors);
        });

        reportErrors(errors, getReportFile().get().getAsFile());
    }

        standardReport.startReport();
        for (FileCollection dirSet : getSourceFolders().get()) {
            for (File f : dirSet.getAsFileTree().matching(patternFilterable -> patternFilterable.exclude(getExcludes()))) {
                standardReport.report(new FileDocument(f));
            }
        }
        standardReport.endReport();

    public DirectoryProperty getOutputDirectory() {
        return outputDirectory;
    }

    @SkipWhenEmpty
    @InputFiles
    public FileTree getTestFiles() {
        return sourceDirectory.getAsFileTree().matching(testPatternSet);
    }

    @TaskAction
    public void transform() throws IOException {
        // clean the output directory to ensure no stale files persist