question: private synchronized boolean expungeStaleEntries ( ) { if ( this . size == 0 ) return false ; Object r ; boolean result = false ; while ( ( r = queue . poll ( ) ) != null ) { result = true ; SingleEntry e = ( SingleEntry ) r ; this . size -= e . cleanupPkTable ( this . table ) ; this . nonDatedEntryCount -= e . cleanupSemiUniqueTable ( this . nonDatedTable ) ; } return result ; }
target:  Expunge stale entries from the nonDatedTable.