error[E0405]: cannot find trait `ApiV4` in module `self::runtime_decl_for_api`
  --> tests/ui/impl_missing_version.rs:35:13
   |
25 |     pub trait Api {
   |     ------------- similarly named trait `ApiV2` defined here
...
35 |     impl self::Api<Block> for Runtime {
   |                ^^^ help: a trait with a similar name exists: `ApiV2`