code: def _resetaA(self,pot=None,type=None):
          
          if (not pot is None and pot != self._aAPot) \
                  or (not type is None and type != self._aAType):
              delattr(self,'_aA')
              return True
          else:
              pass
docs: NAME:
             _resetaA
          PURPOSE:
             re-set up an actionAngle module for this Orbit
             ONLY TO BE CALLED FROM WITHIN SETUPAA
          INPUT:
             pot - potential
          OUTPUT:
             True if reset happened, False otherwise
          HISTORY:
             2012-06-01 - Written - Bovy (IAS)