inputs.files(extension.getCssFiles())
                .withPropertyName("manual")
                .withPathSensitivity(PathSensitivity.RELATIVE);
            inputs.dir("src/main/resources")
                .withPropertyName("resources")
                .withPathSensitivity(PathSensitivity.RELATIVE);
            inputs.dir(extension.getUserManual().getSnippets())
                .withPropertyName("snippets")

     */
    public abstract ConfigurableFileCollection getCssFiles();

    /**
     * The source code to be documented. This should be the "public" APIs.
     */
    public abstract ConfigurableFileCollection getDocumentedSource();

    /**
     * Source code root folders. Java, Groovy & Kotlin public API sources, including
     * generated code.
     */

        if (commitId.isBlank() || commitId.toLowerCase().contains("unknown")) {
            // we can't figure out the commit ID (probably this is a source distribution build), let's skip adding source links
            return;
        }

        extension.getSourceRoots().getFiles()
            .forEach(
                file -> {

        if (args.length < 3 || args.length > 4) {
            throw new IllegalArgumentException("USAGE: <style-sheet> <source-file> <dest-file> [dest-dir]");
        }
        File stylesheet = new File(args[0]);
        File source = new File(args[1]);
        File dest = new File(args[2]);
        String destDir = "";
        if (args.length > 3) {
            destDir = args[3];
        }