code: function filter(name, options) {
    return utils.through.obj(function(file, enc, next) {
      if (file.isNull()) {
        next();
        return;
      }
  
      var basename = path.basename(file.history[0]);
      var stem = basename.slice(0, -3);
  
      if (basename === name || stem === name) {
        next(null, file);
      } else {
        next();
      }
    });
  }
docs: Filter files to be rendered