docs: def difference(self, *args):
          """
          Take the difference between one array and a number of other arrays.
          Only the elements present in just the first array will remain.
          """
          setobj = set(self.obj)
          for i, v in enumerate(args):
              setobj = setobj - set(args[i])
          return self._wrap(self._clean._toOriginal(setobj))