How to use the vega-scale.bandSpace function in vega-scale

function configureRangeStep(type, _, count) {
  if (type !== Band && type !== Point) {
    error('Only band and point scales support rangeStep.');
  }

  // calculate full range based on requested step size and padding
  var outer = (_.paddingOuter != null ? _.paddingOuter : _.padding) || 0,
      inner = type === Point ? 1
            : ((_.paddingInner != null ? _.paddingInner : _.padding) || 0);
  return [0, _.rangeStep * bandSpace(count, inner, outer)];
}

bandspace: function(count, paddingInner, paddingOuter) {
    return bandSpace(count || 0, paddingInner || 0, paddingOuter || 0);
  },

export function bandspace(count, paddingInner, paddingOuter) {
  return bandSpace(count || 0, paddingInner || 0, paddingOuter || 0);
}