> + Optional<? extends SecurityGroupApi> sgApi =
> client.getSecurityGroupExtensionForZone(zone);
> +
> + if (!serverApi.isPresent() || !sgApi.isPresent()) {
> + return ImmutableSet.of();
> + }
> +
> + ServerWithSecurityGroups instance = serverApi.get().get(instanceId);
> + if (instance == null) {
> + return ImmutableSet.of();
> + }
> +
> + Set<String> groupNames = instance.getSecurityGroupNames();
> + Set<? extends SecurityGroupInZone> rawGroups =
> +
> sgApi.get().list().filter(nameIn(groupNames)).transform(groupToGroupInZone(zone)).toSet();
> +
> + return ImmutableSet.copyOf(transform(filter(rawGroups, notNull()),
> groupConverter));
Not sure how much value that'd provide over what it's got there already - in
some cases, it's FluentIterable stuff, and so is going to be in its own little
world anyway.
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