trigger critic find oper given classifi take oper turn compar signatur earlier oper version correct earlier bug check match name type paramet list em note em signatur ignor paramet look match line java need worri signatur clash inherit overload encourag oo environ facilit polymorph algorithm quadrat number oper problem consid sort oper list compar adjac pair potenti log perform param dm link object check critic param dsgr link design creat model us futur develop argo uml link problem problem critic trigger link problem problem overrid predic object dm design dsgr classifi model facad classifi dm problem featur give loop find oper time compar signatur previou held collect oper seen doesn match add collect collect oper seen arrai list object op model facad oper dm compar earlier oper match ve problem object oper seen signatur match op problem add collect round look oper seen add op drop match problem problem 