{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"//_symbols_below_threshold:"}]}
    //_symbols_below_threshold: &[String],
    cached_modules: Vec<(SerializedModule<ModuleBuffer>, WorkProduct)>,
) -> Result<(Vec<ThinModule<GccCodegenBackend>>, Vec<WorkProduct>), FatalError> {