error[E0277]: the trait bound `FooRequest: Serialize` is not satisfied
  --> tests/compile_fail/serde1/opt_out_serde.rs:12:40
   |
12 |     lrcall::serde::Serialize::serialize(&x, f);
   |     ---------------------------------- ^^ the trait `Serialize` is not implemented for `FooRequest`
   |     |
   |     required by a bound introduced by this call
   |
   = note: for local types consider adding `#[derive(serde::Serialize)]` to your `FooRequest` type
   = note: for types from other crates check whether the crate offers a `serde` feature flag
   = help: the following other types implement trait `Serialize`:
             &'a T
             &'a mut T
             ()
             (T,)
             (T0, T1)
             (T0, T1, T2)
             (T0, T1, T2, T3)
             (T0, T1, T2, T3, T4)
           and $N others