ack                     Acknowledge that the work on a message has
                        finished successfully
consume                 Consume a message from a queue
create_queue            Create a queue in a database
default_db              The name of the default database
delete_queue            Delete a queue
ensure_queue            Make sure that a queue exists
is_empty                Check if a queue is empty
list_failed_messages    List failed messages in a queue
list_messages           List all messages in a queue
list_queues             List all queues in a database
liteq                   Lightweight Portable Message Queue Using
                        'SQLite'
message_count           Get the number of messages in a queue.
nack                    Report that the work on a message has failed
publish                 Publish a message in a queue
remove_failed_messages
                        Remove failed messages from the queue
requeue_failed_messages
                        Requeue failed messages
try_consume             Consume a message if there is one available
