class LibraryFragment : Fragment() {      var expandableListView: ExpandableListView? = null     var expandableListAdapter: ExpandableListAdapter? = null     var expandableListTitle: List<String>? = null     var expandableListDetail: LinkedHashMap<String, List<Int>>? = null     private var doubleBackToExitPressedOnce = false     private var isPurchasedKey = false     lateinit var sPref: SharedPreferences     private var prefPurchaseKey = Constants.PREF_PURCHASED_KEY_PRO      override fun onCreate(savedInstanceState: Bundle?) {         super.onCreate(savedInstanceState)         setHasOptionsMenu(true)          activity?.onBackPressedDispatcher?.addCallback(this, object : OnBackPressedCallback(true) {             override fun handleOnBackPressed() {                 if (doubleBackToExitPressedOnce) {                     requireActivity().finish()                     return                 }                  doubleBackToExitPressedOnce = true                 Toast.makeText(requireActivity(), getString(R.string.toast), Toast.LENGTH_SHORT).show()                  Handler().postDelayed(Runnable { doubleBackToExitPressedOnce = false }, 2000)             }          })     }      override fun onViewCreated(view: View, savedInstanceState: Bundle?) {         super.onViewCreated(view, savedInstanceState)     }      override fun onCreateView(         inflater: LayoutInflater, container: ViewGroup?,         savedInstanceState: Bundle?     ): View? {          // Inflate the layout for this fragment         return inflater.inflate(R.layout.fragment_library, container, false)     }      override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {         inflater.inflate(R.menu.library_menu, menu)         super.onCreateOptionsMenu(menu, inflater)     }      override fun onOptionsItemSelected(item: MenuItem): Boolean {          when(item.itemId){              R.id.searchArticles->{                 findNavController().navigate(R.id.navigation_search_texts)             }              R.id.favoritesTexts->{                 val intent = Intent(context, FavoriteTextActivity::class.java)                 startActivity(intent)             }          }         return super.onOptionsItemSelected(item)     }      override fun onStart() {         super.onStart()          sPref = requireActivity().getSharedPreferences("Settings", Context.MODE_PRIVATE)         isPurchasedKey = sPref.getBoolean(prefPurchaseKey, false)          expandableListView = view?.findViewById(R.id.expandableListView) as ExpandableListView         expandableListDetail = LibraryListDataPump.getData() as LinkedHashMap<String, List<Int>>?         expandableListTitle = ArrayList(expandableListDetail!!.keys)         expandableListAdapter =                 LibraryExpandableListAdapter(                         activity,                         expandableListTitle,                         null,                         isPurchasedKey                 )         expandableListView!!.setAdapter(expandableListAdapter)         expandableListView!!.setOnGroupExpandListener { groupPosition ->             if (groupPosition != 6) {                 openLibrary?hapter(groupPosition)             } else {                 if (isPurchasedKey) {                     openLibrary?hapter(groupPosition)                 } else {                     showKeyDialog(                         "Раздел доступен только Pro версии",                         "Чтобы получить доступ к разделу, купите Pro версию в настройках приложения.",                         "Перейти в настройки",                         "Отменить")                 }             }          }     }      fun showKeyDialog(header: String, message: String, positiveButtonText:String, negativeButtonText:String){         var builder = AlertDialog.Builder(activity)         builder.setMessage(message)         builder.setTitle(header)         builder.setPositiveButton(positiveButtonText) { dialogInterface: DialogInterface, i: Int ->             dialogInterface.cancel()             val i= Intent(activity, SettingsActivity::class.java)             startActivity(i)         }         builder.setNegativeButton(negativeButtonText) { dialogInterface: DialogInterface, i: Int ->             dialogInterface.cancel()         }         builder.create().show()     }      private fun openLibrary?hapter(groupPosition: Int) {         val i = Intent(activity, SubLibraryListActivity::class.java)         val l: ArrayList<List<Int>> = ArrayList<List<Int>>(expandableListDetail!!.values)          i.putExtra("LibraryGroupID", (groupPosition + 1).toString())         i.putExtra("LibraryGroupTitle", (expandableListTitle as ArrayList<String>)[groupPosition])         i.putExtra("LibraryList", l[groupPosition] as java.util.ArrayList<Int>)         startActivity(i)     }  }   

   if (groupPosition != 6) {                 openLibrary?hapter(groupPosition)             } else {                 if (isPurchasedKey) {                     openLibrary?hapter(groupPosition)                 } else {                     showKeyDialog(                         "Раздел доступен только Pro версии",                         "Чтобы получить доступ к разделу, купите Pro версию в настройках приложения.",                         "Перейти в настройки",                         "Отменить")                 }             }   

   groupPosition != 6 or groupPosition != 4   

   groupPosition != 6 AND groupPosition != 4   

   if (groupPosition != 6 && groupPosition != 4) {