def __markTaskUncompletedIfNecessary(self, task):
if task.completed():
task.setCompletionDate(date.Date())
def __markTaskCompletedIfNecessary(self, task, completionDate):
if task.allChildrenCompleted() and not task.completed() and \
self.__shouldMarkTaskCompletedWhenAllChildrenCompleted(task):
task.setCompletionDate(completionDate)
