{"ast_node_type":"other","tokens":[{"end":116,"kind":"keyword","start":0,"text":"//"}]}
        // <https://rust-lang.github.io/rfcs/2094-nll.html#problem-case-3-conditional-control-flow-across-functions>
        // efficiency even for the common case where the key is in the map.
        // (Cannot use `get_mut_or` since `get_global_alloc` needs `&self`, and that boils down to