the sample of update method does tell you that already:
//3) safely loop through foundset (starts with selected row)
controller.setSelectedIndex(1)
var count = 0
var fsUpdater = databaseManager.getFoundSetUpdater(foundset)
while(fsUpdater.next())
{
fsUpdater.setColumn(‘my_flag’,count++)
}
will see if i can improve the doc itself a bit.