static bool ReplaceNamedSlotHostContent ( [UWidget](API\Runtime\UMG\Components\UWidget) * WidgetTemplate, [TScriptInterface](API\Runtime\CoreUObject\UObject\TScriptInterface)< [INamedSlotInterface](API\Runtime\UMG\Components\INamedSlotInterface) > NamedSlotHost, [UWidget](API\Runtime\UMG\Components\UWidget) * NewContentWidget )