task.source(dslStandaloneDocbook);
            task.getStylesheetDirectory().convention(dslReference.getStylesheetDirectory());
            task.getStylesheetHighlightFile().convention(dslReference.getHighlightStylesheet());
            task.getDocbookStylesheets().from(userGuideStyleSheetConf);

            task.getClasspath().from(userGuideTask);

     */
    public abstract DirectoryProperty getStylesheetDirectory();

    /**
     * The stylesheet used by the DSL reference to highlight code snippets.
     */
    public abstract RegularFileProperty getHighlightStylesheet();

    /**
     * Resources to include with the generated documentation.
     */
    public abstract ConfigurableFileCollection getResources();

    /**