presto-main/src/main/java/io/prestosql/metadata/InMemoryNodeManager.java/InMemoryNodeManager/getAllNodes
class InMemoryNodeManager:    @Override
    public AllNodes getAllNodes()
    {
        return new AllNodes(ImmutableSet.<InternalNode>builder().add(localNode).addAll(remoteNodes.values()).build(), ImmutableSet.of(), ImmutableSet.of(), ImmutableSet.of(localNode));
    }