{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
        let i64_type = create_type(CType::Int64t, tcx.types.i64);
        let i32_type = create_type(CType::Int32t, tcx.types.i32);
        let u8_type = create_type(CType::UInt8t, tcx.types.u8);