message: Mark Cache as Sync
diff: @@ -245,6 +245,14 @@ where
  }
  }
  +unsafe impl<A, S, Q> Sync for Cache<A, S, Q>
  +where
  + A: BackendApi + 'static,
  + S: Storage + 'static,
  + Q: Querier + 'static,
  +{
  +}
  +
  /// save stores the wasm code in the given directory and returns an ID for lookup.
  /// It will create the directory if it doesn't exist.
  /// Saving the same byte code multiple times is allowed.
  