{"ast_node_type":"other","tokens":[{"end":42,"kind":"keyword","start":0,"text":"ty::Alias(ty::Opaque,"}]}
            ty::Alias(ty::Opaque, ..) => {
            // normalizes to an opaque type, then it will reach this branch.
                FfiUnsafe { ty, reason: fluent::lint_improper_ctypes_opaque, help: None }