Enables or disables Analytical Model, if the Element allows a one-operation Analytical Model toggle. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2011 
Syntax
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Parameters
- enable
 -  Type:  System Boolean  
Enable (true) or disable (false) Analytical Model.