{"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"///"}]}
    /// Cache generated vtables
    pub instances: RefCell<FxHashMap<Instance<'tcx>, &'ll Value>>,
    pub vtables: RefCell<FxHashMap<(Ty<'tcx>, Option<ty::ExistentialTraitRef<'tcx>>), &'ll Value>>,