If set, specifies the default maximum duration of decision tasks for this workflow type. This default can be overridden when starting a
workflow execution using the StartWorkflowExecution action or the StartChildWorkflowExecutionDecision. The valid
values are integers greater than or equal to 0. An integer value can be used to specify the duration in seconds while NONE can
be used to specify unlimited duration.
Constraints:

C# |
public string DefaultTaskStartToCloseTimeout { get; set; }