How to use the fela-tools.objectReduce function in fela-tools

renderer._renderStyleToCache = (
    className: string,
    style: Object,
    pseudo: string = '',
    media: string = ''
  ) => {
    const ruleSet = objectReduce(
      style,
      (ruleset, value, property) => {
        if (isObject(value)) {
          if (isNestedSelector(property)) {
            renderer._renderStyleToCache(
              className,
              value,
              pseudo + normalizeNestedProperty(property),
              media
            )
          } else if (isMediaQuery(property)) {
            const combinedMediaQuery = generateCombinedMediaQuery(
              media,
              property.slice(6).trim()
            )