private void update() {
        // triggers resizing of balloon when necessary
        myRootPanel.revalidate();
        Balloon balloon = JBPopupFactory.getInstance().getParentBalloonFor(myRootPanel);
        if (balloon != null && !balloon.isDisposed()) balloon.revalidate();

        updater.cancelAllRequests();
        if (!updater.isDisposed()) {
          updater.addRequest(() -> {
            final RegExpMatchResult result = isMatchingText(regExpFile, myRegExp.getText(), mySampleText.getText());
            regExpFile.putUserData(RESULT, result);
            if (result != RegExpMatchResult.MATCHES && result != RegExpMatchResult.FOUND) {
              setMatches(regExpFile, null);
            }
            ApplicationManager.getApplication()
              .invokeLater(() -> reportResult(result, regExpFile), ModalityState.any(), __ -> updater.isDisposed());
          }, 0);
        }
      }
private void update()