syntax_data: {"ast_node_type":"other","tokens":[{"end":9,"kind":"keyword","start":0,"text":"where"}]}
source_snippet:     where
context_before:     ) -> Result<(T, UnordMap<ty::BoundRegion, ty::Region<'tcx>>), fmt::Error>
context_after:         T: TypeFoldable<TyCtxt<'tcx>>,