Added onPrepareOptionsMenu method to ViewController

navigation/src/main/java/ru/touchin/roboswag/components/navigation/fragments/ViewControllerFragment.kt

@@ -171,6 +171,10 @@ open class ViewControllerFragment<TActivity : FragmentActivity, TState : Parcela
         viewController?.onCreateOptionsMenu(menu, inflater)
     }
 
+    override fun onPrepareOptionsMenu(menu: Menu?) {
+        viewController?.onPrepareOptionsMenu(menu)
+    }
+
     override fun onOptionsItemSelected(item: MenuItem): Boolean =
             viewController?.onOptionsItemSelected(item) == true || super.onOptionsItemSelected(item)
 

navigation/src/main/java/ru/touchin/roboswag/components/navigation/viewcontrollers/ViewController.kt

@@ -160,6 +160,19 @@ open class ViewController<TActivity : FragmentActivity, TState : Parcelable>(
      */
     open fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) = Unit
 
+    /**
+     * Prepare the standard options menu to be displayed.  This is
+     * called right before the menu is shown, every time it is shown.
+     * You can use this method to efficiently enable/disable items or otherwise
+     * dynamically modify the contents.
+     *
+     * @param menu The options menu as last shown or first initialized by onCreateOptionsMenu().
+     *
+     * @see [Fragment.hasOptionsMenu]
+     * @see [onCreateOptionsMenu]
+     */
+    open fun onPrepareOptionsMenu(menu: Menu?) = Unit
+
     /**
      * Calls right after construction of [ViewController].
      * Happens at [ViewControllerFragment.onActivityCreated].