[FUsdSchemaTranslatorTaskChain](API\Plugins\USDSchemas\FUsdSchemaTranslatorTaskChain) & Then ( [ESchemaTranslationLaunchPolicy](API\Plugins\USDSchemas\ESchemaTranslationLaunchPolicy) Policy, [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< bool() > Callable )