{"ast_node_type":"variable","tokens":[{"end":75,"kind":"keyword","start":0,"text":"let"}]}
        let filenames_buffer = llvm_cov::write_filenames_to_buffer(&table);
        // bytes, so that we can embed that hash in `__llvm_covfun` records.
        let filenames_hash = llvm_cov::hash_bytes(&filenames_buffer);