{"ast_node_type":"variable","tokens":[{"end":65,"kind":"keyword","start":0,"text":"let"}]}
        let i32_type = create_type(CType::Int32t, tcx.types.i32);
        let i16_type = create_type(CType::Int16t, tcx.types.i16);
        let i64_type = create_type(CType::Int64t, tcx.types.i64);