virtual [FSpatialAccelerationIdx](API\Runtime\Chaos\Chaos\FSpatialAccelerationIdx) AddSubstructure ( [TUniquePtr](API\Runtime\Core\Templates\TUniquePtr)< [ISpatialAcceleration](API\Runtime\Engine\Physics\Experimental\ISpatialAcceleration)< [TPayloadType](API\Runtime\Chaos\Chaos\TSpatialAccelerationCollection\TPayloadType), [T](API\Runtime\Chaos\Chaos\TSpatialAccelerationCollection\T), d >> && Substructure, uint16 BucketIdx, uint16 BucketInnerIdx )