text: function appendHeaderCss(resultsCss, prefix) {
    resultsCss.push(`
  .${prefix} {
      width: 1em;
      height: 1em;
      background-size: 1em 1em;
      display: inline-block;
  }`);
  }
  
  function appendEntryCss(resultsCss, dataUrl, prefix, icon) {
    resultsCss.push(`
  .${prefix}-${icon} {
      background-image: url('${dataUrl}');
  }`);
  }
  
  module.exports = {
    appendHeaderCss,
    appendEntryCss
  };
  