code: function chromeStorageGet(keys, callback) {
    window.chrome.storage.sync.get(keys, function(data) {
      if (window.chrome.runtime.lastError) {
        callback(window.chrome.runtime.lastError);
      } else {
        callback(undefined, data);
      }
    });
  }
docs: A function that is called when save data has finished being retrieved.
  @callback saveDataGetFinished
  @param {error} err If defined, err is the error that occurred when retrieving the data.
  @param {object} data The key-value pairs of data that were previously saved.
   
  Retrieve data previously stored with {@link Splat.saveData.set}.
  @alias Splat.saveData.get
  @param {string | Array} keys A single key or array of key names of data items to retrieve.
  @param {saveDataGetFinished} callback A callback that is called with the data when it has been retrieved.