=begin
=RUNIT::Setuppable module

==Methods:

: attach_setup(setupmethod, testmethod1 [,testmethod2,...])
      Attaches ((|setupmethod|)) to ((|testmethod1|))(, ((|testmethod2|)),...). 
      The ((|setupmethod|)) is called after setup called, 
      before testmethod1(, ((|testmethod2|)),...) called.

: invoke_setup(testmethod)
      Invokes setupmethod which is attached to ((|testmethod|)). 
      If no method attached, then do nothing.
=end
