{"ast_node_type":"function","tokens":[{"end":52,"kind":"keyword","start":0,"text":"pub"}]}
    pub fn create_or_fetch(&mut self, key: K) -> V {
impl<K: PartialEq + Hash + Eq, V: Copy + Debug + PartialEq + IndexedVal> IndexMap<K, V> {
        let len = self.index_map.len();