// Type 'TestFC<"a" | "b">' is not assignable to type 'TestFC<"a">'.
//   Types of property 'propTypes' are incompatible.
//     Type 'WeakValidationMap<{ data: "a" | "b"; }> | undefined' is not assignable to type 'WeakValidationMap<{ data: "a"; }> | undefined'.
//       Type 'WeakValidationMap<{ data: "a" | "b"; }>' is not assignable to type 'WeakValidationMap<{ data: "a"; }>'.
//         Types of property 'data' are incompatible.
//           Type 'Validator<"a" | "b"> | undefined' is not assignable to type 'Validator<"a"> | undefined'.
//             Type 'Validator<"a" | "b">' is not assignable to type 'Validator<"a">'.
//               Type '"a" | "b"' is not assignable to type '"a"'.
//                 Type '"b"' is not assignable to type '"a"'.ts(2322)

    "name": "@types/react",
    "version": "18.3.20",