docs: def randomCommaSeparatedIntegerField(self):
          """
          Return the unique integers in the string such as below:
              '6,1,7' or '4,5,1,3,2' or '2,7,9,3,5,4,1' or '3,9,2,8,7,1,5,4,6'
          """
          randint = lambda max: ",".join(
              [str(x) for x in random.sample(range(1, 10), max)]
          )
          lst = [
              randint(3),
              randint(5),
              randint(7),
              randint(9)
          ]
          return self.randomize(lst)