code: def test_groupnorm_1d(self):
      x = objax.random.normal((64, 8, 16))
      gn = objax.nn.GroupNorm1D(8, groups=2)
      y = gn(x, training=True)
      self.assertEqual(y.shape, x.shape)
  
imports: import os
  import unittest
  import jax.numpy
  import numpy
  import objax
label_desc: Use image node_id 2 for calling the TestGroupnorm obj's underlying member method code with example usage: obj.test_groupnorm_1d() without return types