error[E0599]: no method named `register_tool` found for struct `Worker<OllamaClient, CacheLocked>` in the current scope
  --> tests/ui/cache_locked_register_tool.rs:10:20
   |
10 |     let _ = locked.register_tool(def);
   |                    ^^^^^^^^^^^^^ method not found in `Worker<OllamaClient, CacheLocked>`
   |
   = note: the method was found for
           - `Worker<C>`