onPrimaryNavigationFragmentChanged
Callback for when the primary navigation state of this Fragment has changed. This can be the result of the getParentFragmentManager containing FragmentManager} having its primary navigation fragment changed via setPrimaryNavigationFragment or due to the primary navigation fragment changing in a parent FragmentManager.
Parameters
isPrimaryNavigationFragment
True if and only if this Fragment and any parent fragment is set as the primary navigation fragment via setPrimaryNavigationFragment.