syntax_data: {"ast_node_type":"other","tokens":[{"end":35,"kind":"keyword","start":0,"text":")"}]}
source_snippet:     ) -> Result<Ty<'tcx>, Vec<E>> {
context_before:         fulfill_cx: &mut dyn TraitEngine<'tcx, E>,
context_after:         self.structurally_normalize_term(ty.into(), fulfill_cx).map(|term| term.expect_type())