question: public void pruneOldExceptions ( ) { Set < T > members ; members = new HashSet < T > ( memberToGCVersion . keySet ( ) ) ; for ( T member : members ) { Long gcVersion = memberToGCVersion . get ( member ) ; RegionVersionHolder < T > holder ; holder = memberToVersion . get ( member ) ; if ( holder != null && gcVersion != null ) { synchronized ( holder ) { holder . removeExceptionsOlderThan ( gcVersion ) ; } } } localExceptions . removeExceptionsOlderThan ( localGCVersion . get ( ) ) ; }
target:  Remove an exceptions that are older than the current GC version for each member in the RVV.