public function update(ProdutoVO $value)
 {
     $sql = "UPDATE produtos SET nome = ?, marca = ?, preco = ? WHERE id = ?";
     $db = new DB();
     $db->getConnection();
     $db->execSQL($sql);
     $sttm = $db->execSQL($sql);
     $sttm->bind_param("s", $value->getNome());
     $sttm->bind_param("s", $value->getMarca());
     $sttm->bind_param("s", $value->getPreco());
     $sttm->bind_param("i", $value->getId());
     if ($sttm->execute()) {
         return true;
     }
 }