code: def __next__(self):
      if self.curdim > self.dim:
          raise StopIteration
      x = NDArrayGenerator.gen(self.curdim)
      self.curdim += 1
      return x
  
imports: import math
  import random
  from functools import reduce
  from operator import mul
  import random
  from common import xfail_when_nonstandard_decimal_separator
  import mxnet
  from mxnet import nd, autograd, gluon
  from mxnet.test_utils import assert_almost_equal, random_arrays, random_uniform_arrays, rand_shape_nd, same
label_desc: Use image node_id 5 for calling the NDArrayGenerator obj's underlying member method code with example usage: obj.__next__() and returns: x