Gets the systems to which the wire belongs. 
   Namespace:   Autodesk.Revit.DB.Electrical  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 16.0.0.0 (16.0.0.0) 
  Since:  2016 Subscription Update 
Syntax
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Return Value
The systems to which the wire belongs.Remarks
 One wire might belong to more than one circuit.