error: generic WIP interface traits are not supported
 --> tests/ui/custom_lifetime.rs:4:24
  |
4 | pub trait BorrowedValue<'a> {
  |                        ^^^^

warning: unused import: `OperationResult`
 --> tests/ui/custom_lifetime.rs:1:21
  |
1 | use wip_interface::{OperationResult, interface};
  |                     ^^^^^^^^^^^^^^^
  |
  = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default