private static void setSelectedSdkOrNone(@NotNull SdkComboBox comboBox, @Nullable Sdk sdk) {
      if (sdk == null) {
        comboBox.setSelectedItem(comboBox.showNoneSdkItem());
      }
      else {
        comboBox.setSelectedSdk(sdk);
      }
    }
private static void setSelectedSdkOrNone(@NotNull SdkComboBox comboBox, @Nullable Sdk sdk)