How to use the d3fc.axisOrdinalBottom function in d3fc

const getAxisSet = multiLevel => {
        if (multiLevel) {
            return {
                bottom: multiAxisBottom,
                left: multiAxisLeft,
                top: multiAxisTop,
                right: multiAxisRight
            };
        } else {
            return {
                bottom: fc.axisOrdinalBottom,
                left: fc.axisOrdinalLeft,
                top: fc.axisOrdinalTop,
                right: fc.axisOrdinalRight
            };
        }
    };