presto-main/src/main/java/io/prestosql/sql/planner/SubqueryPlanner.java/SubqueryPlanner/appendExistsSubqueryApplyNodes
class SubqueryPlanner:    private PlanBuilder appendExistsSubqueryApplyNodes(PlanBuilder builder, Set<ExistsPredicate> existsPredicates, boolean correlationAllowed)
    {
        for (ExistsPredicate existsPredicate : existsPredicates) {
            builder = appendExistSubqueryApplyNode(builder, existsPredicate, correlationAllowed);
        }
        return builder;
    }