presto-main/src/main/java/io/prestosql/sql/planner/SubqueryPlanner.java/SubqueryPlanner/handleUncorrelatedSubqueries
class SubqueryPlanner:    public PlanBuilder handleUncorrelatedSubqueries(PlanBuilder builder, Collection<Expression> expressions, Node node)
    {
        for (Expression expression : expressions) {
            builder = handleSubqueries(builder, expression, node, false);
        }
        return builder;
    }