{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"ParamLoweringMode::Placeholder"}]}
                ParamLoweringMode::Placeholder => {
            TypeNs::GenericParam(param_id) => match self.ctx.type_param_mode {
                    TyKind::Placeholder(to_placeholder_idx(self.ctx.db, param_id.into()))