tree.setType(definitions.UNIT_TYPE);
tree.setType(Type.NoType);
    public AbsTypeDef AbsTypeDef(Symbol sym) {	AbsTypeDef tree = make.AbsTypeDef(	    sym.pos,            sym,            TypeTerm(sym.pos, sym.nextInfo()),            TypeTerm(sym.pos, sym.loBound()));        tree.setType(definitions.UNIT_TYPE);        return tree;    }