docs: function writeOutput(filePath, content, failOnError, cb) {
      var outStream;
      if (!filePath) {
          if (content) {
              console.log(content);
          }
          if (failOnError) {
              return cb(new gutil.PluginError('gulp-jscs-custom', 'JSCS validation failed', {
                  showStack: false
              }));
          } else {
              return cb();
          }
      }
      outStream = fs.createWriteStream(filePath);
      outStream.write(content, null, cb);
  }