onExit "this" context

### Version
Tell us which versions you are using:

- react-native-router-flux: ^4.0.5
- react: 16.5.0
- react-native: 0.57.2
- react-redux: ^6.0.0

Hi, Any one can show me how it works onExit(), i am doing this:

- Router:

`
X.onExit()}
/>
`
- Component (using connect(), react-redux)

`
import React, { Component } from 'react';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import * as actionCreators from '../Actions/XActions';

class ServicesScreen extends Component {
static onExit() {
this.props.actions.cleanState();
}

render() {
return ...
}
}

const mapStateToProps = ({ state }) => {
const {
x,
} = state;

return {
x
};
};

const mapDispatchToProps = (dispatch) => {
return { actions: bindActionCreators(actionCreators, dispatch) };
};

export default connect(mapStateToProps, mapDispatchToProps)(ServicesScreen);
`

if i console log `Actions.refs.x.props.actions` on onExit() i get `undefined`.

I need to reset my state Component.