The file handle parameter required by the ObjectDumper must be an instance of CfsFileDescriptor. The following example shows how one of the methods, unload:intoFileHandle:atOffset:, is used.
| aCfsFileDescriptor anObject result | aCfsFileDescriptor := CfsFileDescriptor open: 'someobj.swp' oflag: ORDWR | OCREAT. aCfsFileDescriptor isCfsError ifTrue: [^self error: 'Cannot open file']. anObject := 1@2. result := ObjectDumper new unload: anObject intoFileHandle: aCfsFileDescriptor atOffset: 0. aCfsFileDescriptor close. System message: result printString.