/**
* @param keys keys.
* @param topVer Topology version.
* @return Nodes for the keys.
*/
public Collection<GridNode> remoteNodes(Iterable<? extends K> keys, long topVer) {
Collection<Collection<GridNode>> colcol = new GridLeanSet<>();
for (K key : keys) colcol.add(nodes(key, topVer));
return F.view(F.flatCollections(colcol), F.remoteNodes(cctx.localNodeId()));
}
