C++
AcDbDwgFiler* undoFiler();
Description
Returns a pointer to the undo filer for the object.
Custom classes derived from AcDbObject may use the partial Undo mechanism. For such classes, member functions that call assertWriteEnabled with autoUndo set to Adesk::kFalse need to use undoFiler() in order to write out any Undo information needed for a later Undo (at which point the object's applyPartialUndo() function would be called).