2, 'waiters' => ['QueueExists' => ['acceptors' => [['expected' => 200, 'matcher' => 'status', 'state' => 'success'], ['expected' => 'QueueDoesNotExist', 'matcher' => 'error', 'state' => 'retry']], 'delay' => 5, 'maxAttempts' => 40, 'operation' => 'GetQueueUrl']]];