{"ast_node_type":"function","tokens":[{"end":44,"kind":"keyword","start":0,"text":"fn"}]}
    fn krate(&self, def_id: DefId) -> Crate;
    fn vtable_allocation(&self, global_alloc: &GlobalAlloc) -> Option<AllocId>;
    fn instance_name(&self, def: InstanceDef, trimmed: bool) -> Symbol;