presto-main/src/main/java/io/prestosql/metadata/AllNodes.java/AllNodes/AllNodes
class AllNodes:    public AllNodes(Set<InternalNode> activeNodes, Set<InternalNode> inactiveNodes, Set<InternalNode> shuttingDownNodes, Set<InternalNode> activeCoordinators)
    {
        this.activeNodes = ImmutableSet.copyOf(requireNonNull(activeNodes, "activeNodes is null"));
        this.inactiveNodes = ImmutableSet.copyOf(requireNonNull(inactiveNodes, "inactiveNodes is null"));
        this.shuttingDownNodes = ImmutableSet.copyOf(requireNonNull(shuttingDownNodes, "shuttingDownNodes is null"));
        this.activeCoordinators = ImmutableSet.copyOf(requireNonNull(activeCoordinators, "activeCoordinators is null"));
    }