Comment #3 on issue 654 by tu...(a)tudorgirba.com: [Glamour] Undocumented
differences between types of actions
http://code.google.com/p/moose-technology/issues/detail?id=654
It means that ideally, this mechanism should be replaced by some nicer API.
Basically, now you have to instantiate the GLMAction in the block and
manually create a list. I do not particularly like that :). So, I thought
that we should warn people that this might change.