code: function (output, options) {
      this.output = output;
      this.options = options;
  
      // Set sane defaults for any options.
      this.options.rootAssetPath = options.rootAssetPath || './';
      this.options.ignorePaths = options.ignorePaths || [];
      this.options.extensionsRegex = options.extensionsRegex || null;
      this.options.format = options.format || 'general';
  }
docs: Produce a much slimmer version of webpack stats containing only information
  that you would be interested in when creating an asset manifest.
  
  @param {string} output - The output file path.
  @param {object} options - Options to configure this plugin.