What does task_num mean in the MAML tutorial for higher?

I saw this

        for i in range(task_num):

in the MAML tutorial for higher (https://github.com/facebookresearch/higher/blob/master/examples/maml-omniglot.py) but I thought it was confusing because there is only 1 task and therefor 1 data set. So what does that parameter actuall mean?