FineGrainedAtomicHashMap may not lock all the composite keys in optimistic locking

case ApplyDeltaCommand.COMMAND_ID:
  ApplyDeltaCommand command = (ApplyDeltaCommand) wc;
  if (cdl.localNodeIsOwner(command.getKey())) {
    Object[] compositeKeys = command.getCompositeKeys();
    set.addAll(Arrays.asList(compositeKeys));
  }
break;

protected final void lockAndRegisterBackupLock(TxInvocationContext ctx, Object key, long lockTimeout, boolean skipLocking) throws InterruptedException {
  if (cdl.localNodeIsPrimaryOwner(key)) {
    lockKeyAndCheckOwnership(ctx, key, lockTimeout, skipLocking);
  } else if (cdl.localNodeIsOwner(key)) {
    ctx.getCacheTransaction().addBackupLockForKey(key);
  }
}