error: `fold_keyed` should have at least 0 and at most 2 generic type arguments, actually has 3.
 --> tests/compile-fail/surface_fold_keyed_generics_extra.rs:6:29
  |
6 |             -> fold_keyed::<'tick, &str, String, ()>(String::new, |old: &mut _, val| {
  |                             ^^^^^^^^^^^^^^^^^^^^^^^

warning: unused import: `hydroflow::hydroflow_syntax`
 --> tests/compile-fail/surface_fold_keyed_generics_extra.rs:1:5
  |
1 | use hydroflow::hydroflow_syntax;
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default