e.g, given the interface ``` interface Navigable&l...

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[nmdanny]

e.g, given the interface

interface Navigable<out F: Fragment> {
    fun ActionBarTitleRes(): Int
    fun NavBarMenuItemId(): Int? = null

    fun newInstance(): F
}

and the class

class MissionsFragment : Fragment() {
    // code here...
    companion object : Navigable<MissionsFragment> {
        override fun ActionBarTitleRes(): Int = R.string.missions_title
        override fun NavBarMenuItemId(): Int? = R.id.nav_missions

        override fun newInstance(): MissionsFragment {
            return MissionsFragment()
        }
    }

then, inside a function

fun someCheck(someFrag : Fragment) {
}

I would like to check if 'someFrag' has a companion object that implements Navigable<*>