java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.addView(android.view.View, int)' on a null object reference
at com.besome.sketch.editor.view.ViewPane.addViewAndUpdateIndex(ViewPane.java:917)
at com.besome.sketch.editor.view.ViewEditor.createAndAddView(ViewEditor.java:700)
at com.besome.sketch.editor.view.ViewEditor.a(ViewEditor.java:958)
at a.a.a.ViewEditorFragment.onUndo(ViewEditorFragment.java:401)
at a.a.a.ViewEditorFragment.onOptionsItemSelected(ViewEditorFragment.java:501)
at androidx.fragment.app.Fragment.performOptionsItemSelected(Fragment.java:3259)
at androidx.fragment.app.FragmentManager.dispatchOptionsItemSelected(FragmentManager.java:3111)
at androidx.fragment.app.FragmentManager$2.onMenuItemSelected(FragmentManager.java:485)
at androidx.core.view.MenuHostHelper.onMenuItemSelected(MenuHostHelper.java:107)
at androidx.activity.ComponentActivity.onMenuItemSelected(ComponentActivity.kt:481)
at androidx.fragment.app.FragmentActivity.onMenuItemSelected(FragmentActivity.java:265)
at androidx.appcompat.app.AppCompatActivity.onMenuItemSelected(AppCompatActivity.java:269)
at androidx.appcompat.view.WindowCallbackWrapper.onMenuItemSelected(WindowCallbackWrapper.java:109)
at androidx.appcompat.app.ToolbarActionBar$2.onMenuItemClick(ToolbarActionBar.java:66)
at androidx.appcompat.widget.Toolbar$1.onMenuItemClick(Toolbar.java:224)
at androidx.appcompat.widget.ActionMenuView$MenuBuilderCallback.onMenuItemSelected(ActionMenuView.java:769)
at androidx.appcompat.view.menu.MenuBuilder.dispatchMenuItemSelected(MenuBuilder.java:833)
at androidx.appcompat.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:157)
at androidx.appcompat.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:984)
at androidx.appcompat.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:974)
at androidx.appcompat.widget.ActionMenuView.invokeItem(ActionMenuView.java:620)
at androidx.appcompat.view.menu.ActionMenuItemView.onClick(ActionMenuItemView.java:155)
at android.view.View.performClick(View.java:7184)
at android.view.View.performClickInternal(View.java:7157)
at android.view.View.access$3500(View.java:821)
at android.view.View$PerformClick.run(View.java:27660)
at android.os.Handler.handleCallback(Handler.java:914)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:225)
at android.app.ActivityThread.main(ActivityThread.java:7563)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:994)