Used by CompoundStructure to describe which shell layers participate in wrapping at openings. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
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Members
| Member name | Description | 
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| None | None of the shell layers participate in wrapping at openings. | 
| Exterior | Only the exterior shell layers participate in wrapping at openings. | 
| Interior | Only the interior shell layers participate in wrapping at openings. | 
| ExteriorAndInterior | Both interior and exterior shell layers participate in wrapping at openings. |