actionBatch => a list of actions. Each action will be executed only if the previous action is a success.
update => an immediate action, with no queue.
Returns:
each event return an object that indicate : the result (boolean), the accomplished steps (batch only),
and a message (if errors or string formating)
Events type:
Returns: each event return an object that indicate : the result (boolean), the accomplished steps (batch only), and a message (if errors or string formating)