/** @return Collection of keys that did not pass the filter. */
public Collection<IgniteTxKey> filterFailedKeys() {
return filterFailedKeys == null ? Collections.<IgniteTxKey>emptyList() : filterFailedKeys;
}
/**
* Gets pending versions that are less than {@link #version()}.
*
* @return Pending versions.
*/
public Collection<GridCacheVersion> pending() {
return pending == null ? Collections.<GridCacheVersion>emptyList() : pending;
}