presto-main/src/main/java/io/prestosql/sql/planner/optimizations/AddLocalExchanges.java/AddLocalExchanges/Rewriter
class AddLocalExchanges:        public Rewriter(SymbolAllocator symbolAllocator, PlanNodeIdAllocator idAllocator, Session session)
        {
            this.types = symbolAllocator.getTypes();
            this.idAllocator = idAllocator;
            this.session = session;
        }