syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
source_snippet:     impl<'tcx> MaybeTransmutableQuery<Ty<'tcx>, TyCtxt<'tcx>> {
context_after:         /// This method begins by converting `src` and `dst` from `Ty`s to `Tree`s,