error: custom attribute panicked
 --> $DIR/missing-unsubscribe.rs:6:1
  |
6 | #[rpc]
  | ^^^^^^
  |
  = help: message: [rpc] encountered error: subscription 'hello'. Can't find unsubscribe method, expected a method annotated with `unsubscribe` e.g. `#[pubsub(subscription = "hello", unsubscribe, name = "hello_unsubscribe")]`

error: aborting due to previous error