public boolean validateMigrationStamp(int stamp) {
        int completed = ownerMigrationsCompleted.get();
        int started = ownerMigrationsStarted.get();
        return stamp == completed && stamp == started;
    }
public boolean validateMigrationStamp ( int stamp ) { int completed = ownerMigrationsCompleted . get ( ) ; int started = ownerMigrationsStarted . get ( ) ; return stamp == completed && stamp == started ; }
Returns true if there's no primary replica migrations started and/or completed
since issuance of the given stamp. Otherwise returns false, if there's an ongoing migration
when stamp is issued or a new migration is started (and optionally completed) after stamp is issued.

@param stamp a stamp
@return true stamp is valid since issuance of the given stamp, false otherwise