public abstract class BaseFragment extends UniversiFragment {

    // Below are listed some of methods that are available in context of this fragment.

    // DIALOGS

    // boolean setDialogController(DialogController)
    // void setDialogFactory(DialogFactory)
    // void setDialogXmlFactory(@XmlRes int)
    // boolean showDialogWithId(int, DialogOptions)
    // boolean dismissDialogWithId(int)
    // boolean showXmlDialog(@XmlRes int, DialogOptions)
    // boolean dismissXmlDialog(@XmlRes)

    // PERMISSIONS

    // int checkSelfPermission(String)
    // boolean shouldShowRequestPermissionRationale(String)
    // void supportRequestPermissions(String[], int)

    // NETWORK CONNECTION

    // boolean isActiveNetworkConnected()

    // BASE IMPLEMENTATION

    @Override
    protected void onBindViews(@NonNull View rootView, @Nullable Bundle savedInstanceState) {
        super.onBindViews(rootView, savedInstanceState);
        final Unbinder unbinder = Butterknife.bind(rootView);
        // ... unbind in onDestroyView(...)
    }
}

@ContentView(R.layout.fragment_sample)
public final class SampleFragment extends BaseFragment {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Attach dialog factory providing DialogFragment instances for fragment's default DialogController.
        setDialogFactory(new SampleDialogs());
        // ... or
        setDialogXmlFactory(R.xml.sample_dialogs);
    }

    @OnClick(R.id.button)
    public void onButtonClick(@NonNull View button) {
        // .... show sample dialog by its corresponding id specified in R.xml.sample_dialogs Xml file
        // In case of SampleDialogs we would use some constant ID specified in such factory.
        showDialogWithId(R.id.sample_dialog);
        // ... dismiss the dialog later
        dismissDialogWithId(R.id.sample_dialog);
    }

    // ... this fragment simply have access to all useful methods provided by UniversiFragment ...
}