How to use the fela-utils.normalizeNestedProperty function in fela-utils

_renderStyleToClassNames(
      { _className, ...style }: Object,
      pseudo: string = '',
      media: string = '',
      support: string = ''
    ): string {
      let classNames = _className ? ` ${_className}` : ''

      for (const property in style) {
        const value = style[property]

        if (isPlainObject(value)) {
          if (isNestedSelector(property)) {
            classNames += renderer._renderStyleToClassNames(
              value,
              pseudo + normalizeNestedProperty(property),
              media,
              support
            )
          } else if (isMediaQuery(property)) {
            const combinedMediaQuery = generateCombinedMediaQuery(
              media,
              property.slice(6).trim()
            )
            classNames += renderer._renderStyleToClassNames(
              value,
              pseudo,
              combinedMediaQuery,
              support
            )
          } else if (isSupport(property)) {
            const combinedSupport = generateCombinedMediaQuery(

(ruleset, value, property) => {
        if (isPlainObject(value)) {
          if (isNestedSelector(property)) {
            renderer._renderStyleToCache(
              className,
              value,
              pseudo + normalizeNestedProperty(property),
              media,
              support
            )
          } else if (isMediaQuery(property)) {
            const combinedMediaQuery = generateCombinedMediaQuery(
              media,
              property.slice(6).trim()
            )

            renderer._renderStyleToCache(
              className,
              value,
              pseudo,
              combinedMediaQuery,
              support
            )