code: def test_dynamic_shape(self, x_shape, num_dims):
      merge = tf.function(batch_apply.merge_leading_dims)
  
      x = tf.TensorSpec([None for _ in x_shape])
      cf = merge.get_concrete_function(x, num_dims)
      y_shape = (np.prod(x_shape[:num_dims]),) + x_shape[num_dims:]
      y_shape_dynamic = cf.output_shapes
      y_shape_dynamic.assert_is_compatible_with(y_shape)
  
      x = tf.ones(x_shape)
      y = cf(x)
      self.assertEqual(y.shape, y_shape)
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import base
  from sonnet.src import batch_apply
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 3 for calling the MergeLeadingDimsTest obj's underlying member method code with example usage: obj.test_dynamic_shape(x_shape, num_dims) without return types