function bartik_clone_preprocess_comment_wrapper(&$variables) {
// Provide contextual information.
$variables['node'] = $variables['content']['#node'];
$variables['display_mode'] = variable_get('comment_default_mode_' . $variables['node']->type, COMMENT_MODE_THREADED);
// The comment form is optional and may not exist.
$variables['content'] += array('comment_form' => array());
$node = $variables['node'];
if($node->type=='question_answer'){
$variables['theme_hook_suggestions'][] = 'comment_wrapper_question_answer';
}
$e = kprint_r($variables,TRUE);
print $e;
}