const [TMap](API\Runtime\Core\Containers\TMap)< [ERenderGridPropsSourceType](API\Plugins\RenderGrid\RenderGrid\ERenderGridPropsSourceType), [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IRenderGridPropsSourceFactory](API\Plugins\RenderGrid\Factories\IRenderGridPropsSourceFactory) > > & GetPropsSourceFactories() const