/*
* Potentially bind to null doc, which will set the Checksum
* to represent a missing file (existsFile() == false)
*/
checksum.bind(doc);
checksum.update();
// Sent an checksum to everybody
ChecksumActivity checksumActivity = new ChecksumActivity(
sarosSession.getLocalUser(), checksum.getPath(),
checksum.getHash(), checksum.getLength());