o <code><a href="Network-Mom-Stompl-Patterns-Basic.html#t:Provider">Provider</a></code>s of job <code><a href="Network-Mom-Stompl-Patterns-Basic.html#t:JobName">JobName</a></code>;
   mapping means different things for:
</p><ul><li> Serice, Task: action is applied to the first
                   active provider of a list of providers
                   and this provider
                   is then sent to the back of the list,
                   hence, implementing a balancer.
</li><li> Topic: action is appl