message: Add missing parentheses, add retrieve unique_pointer with get
diff: @@ -142,8 +142,8 @@ struct EngineContext {
  ", but only ", execution_context.size(),
  "contexts are present.");
  }
  - *exec_ctx = execution_context[idx];
  - return Status::OK;
  + *exec_ctx = execution_context[idx].get();
  + return Status::OK();
  }
  // In explicit batch mode, we maintain a vector of contexts for each engine,
  