API Reference > imodeljs-backend > iModels > ConcurrencyControl > ConcurrencyControl.PessimisticPolicy ConcurrencyControl.PessimisticPolicy Class Specifies the pessimistic concurrency policy. Methods Name Description constructor(): ConcurrencyControl.PessimisticPolicy Defined in core/backend/src/ConcurrencyControl.ts Line 1191 Last Updated: 29 November, 2022