error[E0774]: `derive` may only be applied to `struct`s, `enum`s and `union`s
 --> tests/ui/derive_on_trait.rs:3:1
  |
3 |   #[derive(ArrowField)]
  |   ^^^^^^^^^^^^^^^^^^^^^ not applicable here
4 | / trait Test
5 | | {}
  | |__- not a `struct`, `enum` or `union`

warning: unused import: `arrow2_convert::ArrowField`
 --> tests/ui/derive_on_trait.rs:1:5
  |
1 | use arrow2_convert::ArrowField;
  |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` on by default