Android: Where to put functions that multiple fragments share

I have three fragments and all of them have two functions which are EXACTLY THE SAME. My problem is that I (obviously) don't want to copy the same two functions over and over again and put it in the fragments.

Ain't there a way to put these functions in one place and call them from my fragments? These functions have to do with navController and Toolbar Navigation so I cant put it in my viewmodel. Another solution could be to create a Baseclass fragment, put these functions in there and inherit from it?

Functions

private fun initProgressbar(currentStateNumber: StateProgressBar.StateNumber, progressBarDescription: ArrayList<String>) =
state_progress_bar.apply {
setStateDescriptionData(progressBarDescription)
setCurrentStateNumber(currentStateNumber)
}
private fun initToolbar(navController: NavController, appBarConf: AppBarConfiguration, textToolbar: String?) =
toolbar.apply {
setupWithNavController(navController, appBarConf)
toolbar_title.text = textToolbar
}

I didn't found any solution without violating the mvvm architecture or the lifecyle of the fragments. I am using jetpack navigation, mvvm and dagger hilt.

I appreciate every help.

EDIT: Possible Solution

abstract class BaseFragment(
layout: Int,
private val progressBarDescription: ArrayList<String>,
private val stateNumber: StateProgressBar.StateNumber
) : Fragment(layout) {
private val _navController: NavController by lazy { findNavController() }
private val appBarConf by lazy { AppBarConfiguration(_navController.graph) }
private val calibrateRepairToolbarText by lazy { arguments?.getString("calibrate_repair_toolbar_text") }
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
initProgressbar()
initToolbar()
}
val navController: NavController
get() = _navController
fun initProgressbar(): StateProgressBar = state_progress_bar.apply {
setStateDescriptionData(progressBarDescription)
setCurrentStateNumber(stateNumber)
}
fun initToolbar(): MaterialToolbar = toolbar.apply {
setupWithNavController(_navController, appBarConf)
toolbar_title.text = calibrateRepairToolbarText
}
}

And then in the other Fragment:

class Fragment(
private val progressBarDescription: ArrayList<String>,
@StateNumberOne private val stateNumber: StateProgressBar.StateNumber
) : BaseFragment(
R.layout.fragment_calibrate_repair_message,
progressBarDescription,
stateNumber
) {
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
}
}

You can create a baseFragment, with these methods, and then have your three Fragments extend baseFragment

The solution is that these initToolbar methods belong not to the Fragment, but to the Toolbar. Hence why it has initToolbar in it.

So if you can guarantee that whenever this method is used on any callsite, then it makes sense, then you can create a top-level extension function for the Toolbar.

Otherwise, you could extend Toolbar and use a "compound ViewGroup" to contain the shared view logic.