private void createUIComponents() {
        // Explicit use of MutableCollectionComboBoxModel guarantees that setSelectedItem() can make safe cast.
        languageVersionComboBox = new ComboBox<>(new MutableCollectionComboBoxModel<>());
        jpsPluginComboBoxModel = new ComboBoxModelWithPossiblyDisabledItems();
        kotlinJpsPluginVersionComboBox = new ComboBox<>(jpsPluginComboBoxModel);
        apiVersionComboBox = new ComboBox<>(new MutableCollectionComboBoxModel<>());

        // Workaround: ThreeStateCheckBox doesn't send suitable notification on state change
        // TODO: replace with PropertyChangerListener after fix is available in IDEA
        copyRuntimeFilesCheckBox = new ThreeStateCheckBox() {
            @Override
            public void setState(State state) {
                super.setState(state);
                updateOutputDirEnabled();
            }
        };
    }
private void createUIComponents()