[Class] ManualWorkflowSchedulerService [Description] 
Provides a threading service that allows the host application creating a workflow instance to donate the Thread on which the workflow instance is run. Using this threading service, host applications are able to run a workflow instance on a single Thread (that is, in synchronous mode). This mode blocks the execution of the host application until the workflow instance becomes idle. Subsequently, the workflow instance can only be executed using the RunWorkflow method of this service.