code: function get(key, cb) {
    return type(key) != 'array'
      ? localForage.getItem(key).then(wrap(cb, true), cb)
      : Promise.all(key.map(getSubkey)).then(wrap(cb, true), cb);
  
    function getSubkey(key) {
      return get(key, function() {}); // noob function to prevent logs
    }
  }
docs: Get `key`.
  
  @param {Array|Mixed} key
  @param {Function} cb