syntax_data: {"ast_node_type":"other","tokens":[{"end":57,"kind":"keyword","start":0,"text":"impl<'tcx>"}]}
source_snippet: impl<'tcx> TypeSuperFoldable<TyCtxt<'tcx>> for Ty<'tcx> {
context_after:     fn try_super_fold_with<F: FallibleTypeFolder<TyCtxt<'tcx>>>(