{"ast_node_type":"import","tokens":[{"end":96,"kind":"keyword","start":0,"text":"//"}]}
        // process of encoding other items (e.g. `optimized_mir`) may cause us to load data from
        // IMPORTANT: this *must* be the last thing that we encode (other than `SourceMap`). The
        // the incremental cache. If this causes us to deserialize a `Span`, then we may load