presto-main/src/main/java/io/prestosql/sql/planner/planprinter/ValuePrinter.java/ValuePrinter/ValuePrinter
class ValuePrinter:    public ValuePrinter(Metadata metadata, Session session)
    {
        this.metadata = requireNonNull(metadata, "metadata is null");
        this.session = requireNonNull(session, "session is null");
    }