create synthetic / artificial backstack

BackStackActivity.kt

private fun createArtificialBackStack() {
        if (!lifecycle.currentState.isAtLeast(Lifecycle.State.STARTED))
            return

        supportFragmentManager.beginTransaction()
                .replace(R.id.app_container, HomeFragment.newInstance(), HomeFragment::class.simpleName)
                .addToBackStack(HomeFragment::class.simpleName)
                .setReorderingAllowed(true)
                .commit()

        supportFragmentManager.beginTransaction()
                .replace(R.id.app_container, Fragment1.newInstance(), Fragment1::class.simpleName)
                .addToBackStack(Fragment1::class.simpleName)
                .setReorderingAllowed(true)
                .commit()

        supportFragmentManager.beginTransaction()
                .replace(R.id.app_container, Fragment2.newInstance(), Fragment2::class.simpleName)
                .addToBackStack(Fragment2::class.simpleName)
                .setReorderingAllowed(true)
                .commit()

    }