private void handleChanges() {
    for (int i = 0; i < myNewNames.length; i++) {
      String newName = myNewNames[i];
      if (myShouldRename[i] && !RenameUtil.isValidName(myProject, myRenames[i], newName)) {
        getOKAction().setEnabled(false);
        setErrorText(RefactoringBundle.message("automatic.renaming.dialog.identifier.invalid.error", newName));
        return;
      }
    }
    getOKAction().setEnabled(true);
    setErrorText(null);
  }
private void handleChanges()