code: function transformCss (cssText, transform) {
    let node = parseCss(cssText)
  
    if (typeof transform === 'function') {
      node = transformNode(node, transform)
    }
  
    return toCssText(node)
  }
docs: ---
  category: utilities/themes
  ---
  Transform a string of CSS
  @module transformCss
  @param {String} cssText CSS to parse and transform
  @param {Function} transform a transform function to apply to each rule
  @returns {String} the transformed CSS string