virtual void InitializeWindow ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FGenericWindow](API\Runtime\ApplicationCore\GenericPlatform\FGenericWindow) > & Window, const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FGenericWindowDefinition](API\Runtime\ApplicationCore\GenericPlatform\FGenericWindowDefinition) > & InDefinition, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FGenericWindow](API\Runtime\ApplicationCore\GenericPlatform\FGenericWindow) > & InParent, const bool bShowImmediately )