void HandleRemoveOperation ( [FClusterUnionIndex](API\Runtime\Chaos\Chaos\FClusterUnionIndex) ClusterIndex, const [TArray](API\Runtime\Core\Containers\TArray)< [FPBDRigidParticleHandle](API\Runtime\Chaos\Chaos\FPBDRigidParticleHandle) * > & Particles, [EClusterUnionOperationTiming](API\Runtime\Chaos\Chaos\Chaos__EClusterUnionOperationTim-) UpdateClusterPropertiesTiming )