/**
  * Exclude object from result
  *
  * @param   ChildComment $comment Object to remove from the list of results
  *
  * @return $this|ChildCommentQuery The current query, for fluid interface
  */
 public function prune($comment = null)
 {
     if ($comment) {
         $this->addUsingAlias(CommentTableMap::COL_COMMENT_ID, $comment->getCommentId(), Criteria::NOT_EQUAL);
     }
     return $this;
 }