{"ast_node_type":"other","tokens":[{"end":81,"kind":"keyword","start":0,"text":"//"}]}
        // in `SourceRootId`s instead of `FileId`s and `FileId` -> `SourceRootId`
        // that can be used by the config module because config talks
        // mapping is not ready until `AnalysisHost::apply_changes` has been called.