public function getArticlesByTag(string $tag, int $size = null) : Collection
    {
        return $this->getArticlesByTagDesc($tag, $size);
    }
public function getArticlesByTag(string $tag, int $size = null) : Collection
    {
        return $this->getArticlesByTagDesc($tag, $size);
    }
public function getArticlesByTag ( string $ tag , int $ size = null ) : Collection { return $ this -> getArticlesByTagDesc ( $ tag , $ size ) ; }
get articles by tag. alias of getArticlesByTagDesc
@param  string     $tag  tag name
@param  integer    $size articles size
@return Collection       article collection
get articles by tag . alias of getArticlesByTagDesc