异步js函数和日志记录出错

我有一个回调函数:

function getStorageByKey(key, callback) {
  chrome.storage.sync.get(key, function(obj, callback) {
    var error = chrome.runtime.lastError;
       if (error) {
           console.error(error);
       }
  callback(obj)
  });
}

我试着这样记录它的输出:

  getStorageByKey('hidden_threads', function (data) {
      console.log(data);
  });

Error in response to storage.get: TypeError: callback is not a function
    at Object.callback (chrome-extension://nnaebcfbeghbbdkcgdicmlagdblheccm/content.js:37:3)
    at getStorageByKey (chrome-extension://nnaebcfbeghbbdkcgdicmlagdblheccm/content.js:32:23)
    at HTMLDocument.<anonymous> (chrome-extension://nnaebcfbeghbbdkcgdicmlagdblheccm/content.js:8:3)
    at j (chrome-extension://nnaebcfbeghbbdkcgdicmlagdblheccm/jquery.min.js:2:29999)
    at k (chrome-extension://nnaebcfbeghbbdkcgdicmlagdblheccm/jquery.min.js:2:30313)