The module contained in the DevExpress.ExpressApp.StateMachine.v18.1.dll assembly.
The State Machine Module comprises a single DevExpress.ExpressApp.StateMachine.v18.1.dll assembly. This assembly contains classes and services that provide state machine functionality in XAF applications. This assembly represents a module, since it contains the StateMachineModule class - a descendant of the ModuleBase class.
The StateMachineModule class exposes properties whose values determine the general behavior of the state machine functionality. To customize these properties, select the StateMachineModule component in the Application Designer's Modules section, and use the Properties window.