presto-main/src/main/java/io/prestosql/sql/planner/plan/ExplainAnalyzeNode.java/ExplainAnalyzeNode/replaceChildren
class ExplainAnalyzeNode:    @Override
    public PlanNode replaceChildren(List<PlanNode> newChildren)
    {
        return new ExplainAnalyzeNode(getId(), Iterables.getOnlyElement(newChildren), outputSymbol, isVerbose());
    }