question: private void collectPendingVersions ( GridDhtTxLocal dhtTxLoc ) { if ( dhtTxLoc . needsCompletedVersions ( ) ) { if ( log . isDebugEnabled ( ) ) log . debug ( "Checking for pending locks with version less then tx version: " + dhtTxLoc ) ; Set < GridCacheVersion > vers = new LinkedHashSet < > ( ) ; collectPendingVersions ( dhtTxLoc . readEntries ( ) , dhtTxLoc . xidVersion ( ) , vers ) ; collectPendingVersions ( dhtTxLoc . writeEntries ( ) , dhtTxLoc . xidVersion ( ) , vers ) ; if ( ! vers . isEmpty ( ) ) dhtTxLoc . pendingVersions ( vers ) ; } }
target:  Collects versions for all pending locks for all entries within transaction