static void OnMaterialLayerAssetChanged ( const struct [FAssetData](API\Runtime\CoreUObject\AssetRegistry\FAssetData) & InAssetData, int32 Index, EMaterialParameterAssociation MaterialType, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< class [IPropertyHandle](API\Editor\PropertyEditor\IPropertyHandle) > InHandle, [FMaterialLayersFunctions](API\Runtime\Engine\Materials\FMaterialLayersFunctions) * InMaterialFunction )