Saving changes on lists deletes list (Lane class). All I want to do is add 'a' to lists name and Trello somehow deletes this list :(
Here is my code sample:
$client = new \Trello\Client(
$key,
$token
);
$board = $client->getBoard($boardId);
$lists = $board->getLists();
foreach ($lists as $list) {
$list->name .= 'a';
$list = $list->save();
}