Customizing the error message for a schema like `Schema.UndefinedOr` can be tricky because the de...

const program = Effect.gen(function*() {
  const schema = Schema.UndefinedOr(Schema.Number).annotations({
    identifier: "FooBar",
    message: () => "Why is this not in the error message?",
  })

  yield* Schema.decodeUnknown(schema)("invalid")
})

  ParseError: FooBar
  ├─ Expected number, actual "invalid"
  └─ Expected undefined, actual "invalid"

  ParseError: FooBar
  └─ Why is this not in the error message?