code: function addonsManager_waitForSearchFinished(aSpec) {
      var spec = aSpec || { };
      var timeout = (spec.timeout == undefined) ? TIMEOUT_SEARCH : spec.timeout;
  
      // TODO: restore after 1.5.1 has landed
      // var self = this;
      // 
      // mozmill.utils.waitFor(function () {
      //   return self.isSearching == false;
      // }, timeout, 100, "Search has been finished");
      
      mozmill.utils.waitForEval("subject.isSearching == false", 
                                timeout, 100, this);
    }
docs: Waits until the active search has been finished
  
  @param {object} aSpec
  Object with parameters for customization
  Elements: timeout - Duration to wait for the target state