code: def test_forward(self):
      layer = tl.AvgPool(pool_size=(2, 2), strides=(2, 2))
      x = np.array(
          [
              [
                  [[1, 2, 3], [4, 5, 6], [10, 20, 30], [40, 50, 60]],
                  [[4, 2, 3], [7, 1, 2], [40, 20, 30], [70, 10, 20]],
              ]
          ]
      )
      y = layer(x)
      self.assertEqual(
          tl.to_list(y), [[[[4.0, 2.5, 3.5], [40, 25, 35]]]]
      )
  
file_path: trax/trax/layers/pooling_test.py
imports: from absl.testing import absltest
  import numpy
  import trax.layers
label_desc: Use image node_id 2 for calling the AvgPoolTest obj's underlying member method code with example usage: obj.test_forward() without return types