Retrieves all queues.

        :keyword str prefix: Optionally, only return queues that start with
            this value.
        :rtype: list
        :returns: A list of :py:class:`boto.sqs.queue.Queue` instances.

def get_all_queues(self, prefix=''):
        """
        Retrieves all queues.

        :keyword str prefix: Optionally, only return queues that start with
            this value.
        :rtype: list
        :returns: A list of :py:class:`boto.sqs.queue.Queue` instances.
        """
        params = {}
        if prefix:
            params['QueueNamePrefix'] = prefix
        return self.get_list('ListQueues', params, [('QueueUrl', Queue)])