Как добавить строку перед только что выбранным элементом в WheelPicker (React Native JS)

export default class yks extends Component<{}> {
  constructor(props) {
  super(props);
  
  this.state = {
    ttSelectedItem : 20,
    itemList: numberList
  };
}
    onPickerSelect (index, selectedItem) {
        this.setState({
            [selectedItem] : index,
        })
    }
    onAddItem = () => {
        var name = 'XYZ'
        if (this.state.itemList.indexOf(name) == -1) {
            this.state.itemList.push(name)
        }
        this.setState({
            selectedItem: this.state.itemList.indexOf(name),
        })
    }
    }
    }

                <Picker style = {{width: "100%", height: "100%"}}
                    selectedValue = {this.state.ttSelectedItem}
                    itemStyle = {{width: "100%", height: "100%", color:"#e88554", fontSize:26, }}
                    onValueChange = {(index) => this.onPickerSelect(index, 'ttSelectedItem')}>  
                        {this.state.itemList.map((value, i) => (
                            <PickerItem label = {'$' + value} value = {i} key = {"money"+value}/>
                        ))}
                </Picker>