{"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"let"}]}
                    let drop_trait_ref = ty::TraitRef::new(cx, drop_def_id, [self_ty]);
                    let drop_def_id = cx.require_lang_item(TraitSolverLangItem::Drop);
                    const_conditions.push(drop_trait_ref);