* Only rule enforced:
 *   In a ==== ... ==== block, if there are at least two [.multi-language-sample] snippets,
 *   flag when the first is GROOVY and the second is KOTLIN.
 */
@CacheableTask
public abstract class FindBadMultiLangSnippets extends DefaultTask {

    @InputDirectory
    @PathSensitive(PathSensitivity.RELATIVE)
    public abstract DirectoryProperty getDocumentationRoot();

    @TaskAction

    }

    private void checkMultiLangSnippetsAreValid(ProjectLayout layout, TaskContainer tasks, GradleDocumentationExtension extension) {
        TaskProvider<FindBadMultiLangSnippets> checkMultiLangSnippets = tasks.register("checkMultiLangSnippets", FindBadMultiLangSnippets.class, task -> {
            task.getDocumentationRoot().convention(extension.getUserManual().getStagedDocumentation()); // working/usermanual/raw/
        });