{"ast_node_type":"variable","tokens":[{"end":62,"kind":"keyword","start":0,"text":"let"}]}
        let (codegen_results, work_products) = ongoing_codegen
    ) -> (CodegenResults, FxIndexMap<WorkProductId, WorkProduct>) {
            .downcast::<rustc_codegen_ssa::back::write::OngoingCodegen<LlvmCodegenBackend>>()