Gets the flow value of this analytical connection. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 18.0.0.0 (18.2.0.0) 
  Since:  2018 
Syntax
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Return Value
The flow value.Remarks
 If the network flow is asynchronously calculated, this method would wait until the calculation is completed. This ensures the returned flow value is always up to date.