Utility classes commonly useful in concurrent programming.
 
 
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StructuredTaskScope.ShutdownOnFailure.join()
 
Wait for all subtasks started in this task scope to complete or for a subtask
 to  failPREVIEW. 
 
Wait for all subtasks started in this task scope to complete or for a subtask
 to  failPREVIEW, up to the given deadline.