Can't find decodingFallback

const SomeSchema = Schema.Union(Schema.Literal("EN"), Schema.Literal("FR")).annotations({
  decodingFallback: () => Either.right("EN")
});

const result = Schema.decodeUnknownSync(SomeSchema)(null)
result // "EN"

Object literal may only specify known properties, and decodingFallback does not exist in type Schema<...>