True if the results of the filter are inverted; worksets that would normally be accepted by this filter will be rejected, and worksets that would normally be rejected will be accepted. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012