public void OnTabSelected(ActionBar.Tab tab, FragmentTransaction ft)
            {
                if (_cleared)
                    return;
                var bar = (ActionBar)tab.GetBindingMemberValue(AttachedMembers.Object.Parent);
                var placeHolder = ActionBarView.GetTabContentId(bar);
                var activity = bar.ThemedContext.GetActivity();
                SetContent(tab, ft, placeHolder, activity, bar);
                //Set selected item data context or tab
                var selectedItem = bar.GetBindingMemberValue(ItemsSourceGeneratorBase.MemberDescriptor) == null ? tab : tab.GetDataContext();
#if APPCOMPAT
                bar.SetBindingMemberValue(AttachedMembersCompat.ActionBar.SelectedItem, selectedItem);
#else
                bar.SetBindingMemberValue(AttachedMembers.ActionBar.SelectedItem, selectedItem);
#endif
            }