syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"self.visit_opaque_ty(alias_ty);"}]}
source_snippet:                     self.visit_opaque_ty(alias_ty);
context_before:                     let ty::Alias(ty::Opaque, alias_ty) = *ty.kind() else { bug!("{ty:?}") };
context_after:                 }