Modifying code
For an analysis, I have modified `onResultAccepted()` like this
```
    m_state.add(result, error);
    if (m_state.accepted + m_state.rejected >= 5 ) { 
         controller->network()->stop(); Workers::stop(); uv_stop(uv_default_loop()); 
    }
```
However, it says

```
error: ‘controller’ was not declared in this scope
```
Any idea to fix that?