ElementId of AnalyticalModel element which created the AnalyticalLink (if any) invalidElementId if this Analytical Link was created by the User or API 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013