@NlsContexts.DialogMessage
  private String validateData() {
    PsiManager manager = PsiManager.getInstance(myProject);
    for (int idx = 0; idx < myFields.length; idx++) {
      if (myCheckedMarks[idx]) {
        String name;
        if (isToEncapsulateGet()) {
          name = myGetterNames[idx];
          if (!PsiNameHelper.getInstance(manager.getProject()).isIdentifier(name)) {
            return RefactoringMessageUtil.getIncorrectIdentifierMessage(name);
          }
        }
        if (!myFinalMarks[idx] && isToEncapsulateSet()) {
          name = mySetterNames[idx];
          if (!PsiNameHelper.getInstance(manager.getProject()).isIdentifier(name)) {
            return RefactoringMessageUtil.getIncorrectIdentifierMessage(name);
          }
        }
      }
    }
    return null;
  }
@NlsContexts.DialogMessage
  private String validateData()