question: public Set < String > knownClasses ( ) { Set < String > r = new HashSet < String > ( ) ; r . addAll ( branchMap . keySet ( ) ) ; r . addAll ( branchlessMethods . keySet ( ) ) ; if ( logger . isDebugEnabled ( ) ) { logger . debug ( "Known classes: " + r ) ; } return r ; }
target:  Returns a Set containing all classes for which this pool knows Branches for as Strings