code: public function afterStep(Scope\StepScope $scope)
      {
          // If "mainWindow" variable is not empty that means that additional window has been opened.
          // Then, if number of opened windows equals to one, we need to switch back to original window,
          // otherwise an error will occur: "Window not found. The browser window may have been closed".
          // This happens due to auto closing window by JavaScript (CKFinder does this after choosing a file).
          if (!empty($this->mainWindow) && count($this->getWindowNames()) == 1) {
              $this->iSwitchToWindow();
          }
  
          if (self::hasTag('javascript') && self::isStepImpliesJsEvent($scope)) {
              $this->waitAjaxAndAnimations();
          }
      }
docs: IMPORTANT! The "AfterStep" hook should not be tagged, because steps has no tags!
  
  @param Scope\StepScope|Scope\AfterStepScope $scope
  Scope of the processing step.
  
  @AfterStep