{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"self.v.get(Self::to_idx(idx)).and_then(|it|"}]}
        self.v.get(Self::to_idx(idx)).and_then(|it| it.as_ref())
    pub fn get(&self, idx: Idx<T>) -> Option<&V> {
    }