*/
    public abstract DirectoryProperty getRoot();

    /**
     * Source of snippets that can be inserted into the user manual
     */
    public abstract DirectoryProperty getSnippets();

    /**
     * Working directory for staging directory for intermediate user manual files
     */
    public abstract DirectoryProperty getStagingRoot();

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

            Provider<Directory> stylesDir = extension.getUserManual().getStagedDocumentation().dir("css");

            this.docId = docId;
        }

        /**
         * Gets the source snippet.
         *
         * @return the source snippet
         */
        public String getSnippet() {
            return snippet;
        }

        /**
         * Sets the source snippet.
         *
         * @param snippet the source snippet
         */

        assertNull(source.getSnippet());

        source.setUrl("https://example.com");
        source.setTitle("Example Page");
        source.setSnippet("This is a snippet...");

        assertEquals("https://example.com", source.getUrl());
        assertEquals("Example Page", source.getTitle());
        assertEquals("This is a snippet...", source.getSnippet());
    }

    @Test