How to implement a custom component with two values in react-final-form

问题

I have a custom component which renders two values, mainOkved as a string and additionalOkveds as an array. In order to use it without react-final-form I simply add these values to the state and update them onSelect:

onSelectOkved(mainOkved, additionalOkveds) {
  this.setState({
    mainOkved: mainOkved,
    additionalOkveds: additionalOkveds
  });
}

The component itself looks like this:

<OkvedSelector mainOkved={this.state.mainOkved} additionalOkveds={this.state.additionalOkveds} onSelect={this.onSelectOkved} />

How can I implement this component with react-final-form? Should I use mutators or it can be done with a Field?

来源：https://stackoverflow.com/questions/57901348/how-to-implement-a-custom-component-with-two-values-in-react-final-form