syntax_data: {"ast_node_type":"variable","tokens":[{"end":93,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                     let ty::Alias(ty::Opaque, alias_ty) = *ty.kind() else { bug!("{ty:?}") };
context_before:                     let ty = self.tcx.type_of(alias_ty.def_id).instantiate(self.tcx, alias_ty.args);
context_after:                     self.visit_opaque_ty(alias_ty);