presto-parser/src/main/java/io/prestosql/sql/TreePrinter.java/TreePrinter/TreePrinter
class TreePrinter:    public TreePrinter(IdentityHashMap<Expression, QualifiedName> resolvedNameReferences, PrintStream out)
    {
        this.resolvedNameReferences = new IdentityHashMap<>(resolvedNameReferences);
        this.out = out;
    }