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

support,
              property.slice(9).trim()
            )
            classNames += renderer._renderStyleToClassNames(
              value,
              pseudo,
              media,
              combinedSupport
            )
          } else {
            console.warn(`The object key "${property}" is not a valid nested key in Fela.
Maybe you forgot to add a plugin to resolve it?
Check http://fela.js.org/docs/basics/Rules.html#styleobject for more information.`)
          }
        } else {
          const declarationReference = generateDeclarationReference(
            property,
            value,
            pseudo,
            media,
            support
          )

          if (!renderer.cache.hasOwnProperty(declarationReference)) {
            // we remove undefined values to enable
            // usage of optional props without side-effects
            if (isUndefinedValue(value)) {
              renderer.cache[declarationReference] = {
                className: '',
              }
              /* eslint-disable no-continue */
              continue

css: string,
  media: string = '',
  support?: string = '',
  cache?: Object = {}
): Object {
  let decl

  // This excellent parsing implementation was originally taken from Styletron and modified to fit Fela
  // https://github.com/rtsao/styletron/blob/master/packages/styletron-client/src/index.js#L47
  /* eslint-disable no-unused-vars,no-cond-assign */
  while ((decl = DECL_REGEX.exec(css))) {
    // $FlowFixMe
    const [ruleSet, className, pseudo, property, value] = decl
    /* eslint-enable */

    const declarationReference = generateDeclarationReference(
      property,
      value,
      pseudo,
      media,
      support
    )

    cache[declarationReference] = generateCacheEntry(
      RULE_TYPE,
      className,
      property,
      value,
      pseudo,
      media,
      support
    )