presto-main/src/main/java/io/prestosql/sql/planner/optimizations/AddExchanges.java/AddExchanges/AddExchanges
class AddExchanges:    public AddExchanges(Metadata metadata, TypeAnalyzer typeAnalyzer)
    {
        this.metadata = metadata;
        this.domainTranslator = new DomainTranslator(metadata);
        this.typeAnalyzer = typeAnalyzer;
    }