static void FindMatchingSlotDefinitionIndices ( const [USmartObjectDefinition](API\Plugins\SmartObjectsModule\USmartObjectDefinition) & Definition, const [FSmartObjectRequestFilter](API\Plugins\SmartObjectsModule\FSmartObjectRequestFilter) & Filter, [TArray](API\Runtime\Core\Containers\TArray)< int32 > & OutValidIndices )