The method that Revit will invoke to perform an export to IFC. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
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Parameters
- document
 -  Type:  Autodesk.Revit.DB Document  
The document to export. 
- exporter
 -  Type:  Autodesk.Revit.DB.IFC ExporterIFC  
The IFC exporter object. 
- filterView
 -  Type:  Autodesk.Revit.DB View  
The view whose filter visibility settings govern the export. 
Remarks
 There will be a transaction group opened for the document. Any changes made to the document must be temporary, as the transaction group will automatically be rolled back at the end.