{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"cx.typing_env().as_query_input(Ty::new_tup(cx.tcx(),"}]}
                cx.typing_env().as_query_input(Ty::new_tup(cx.tcx(), &[a.layout.ty, b.layout.ty])),
            .layout_of(
            )