How to use the defaults.stateChoices function in defaults

function getRandomState() {
    // get & hydrate the template which shuffles all the possible choices
    return _.mapValues(_.cloneDeep(DEFAULTS.stateChoices), sampleChoices);
}

_onShuffleOption = (key) => {
        if(!_.has(DEFAULTS.stateChoices, key)) return;
        this.setState(
            {
                [key]: this._getRandomOption(key),
                screenId: +(new Date())
            },
            this._saveStateToUrl
        );
    };
    _onShuffleOptions = () => {

_getRandomOption = (key) => {
        const option = sampleChoices(DEFAULTS.stateChoices[key]);
        if(key === 'domain')
            option.x = option.x || this._xDomainFromYDomain(option.y);
        return option;
    };