{"ast_node_type":"variable","tokens":[{"end":92,"kind":"keyword","start":0,"text":"let"}]}
        let main_sig = get_function_sig(tcx, m.target_config().default_call_conv, instance);
        let main_name = tcx.symbol_name(instance).name;
        let main_func_id = m.declare_function(main_name, Linkage::Import, &main_sig).unwrap();