[EClusterGenerationError](API\Developer\HierarchicalLODUtilities\EClusterGenerationError) & operator&= ( [EClusterGenerationError](API\Developer\HierarchicalLODUtilities\EClusterGenerationError) & Lhs, [EClusterGenerationError](API\Developer\HierarchicalLODUtilities\EClusterGenerationError) Rhs )