suspendUser()

This method is called whenever the Agent is stopped from working. This can be called before moving this Agent or when pausing an Agent. One should write here the code to put the Agent into a clean state to be serialized. If the Agent is processing a method which needs a lot time to finish, this method should be able to stop that method. You can to this by using boolean variable which are watched in the method and let it exit when the state changed.