presto-main/src/main/java/io/prestosql/sql/planner/planprinter/PlanPrinter.java/PlanPrinter/visitRemoteSource
class PlanPrinter:        @Override
        public Void visitRemoteSource(RemoteSourceNode node, Void context)
        {
            addNode(node,
                    format("Remote%s", node.getOrderingScheme().isPresent() ? "Merge" : "Source"),
                    format("[%s]", Joiner.on(',').join(node.getSourceFragmentIds())),
                    ImmutableList.of(),
                    ImmutableList.of(),
                    node.getSourceFragmentIds());

            return null;
        }