code: def test_dynamic(self):
      if tf.executing_eagerly():
          return
      x = tf1.placeholder_with_default(
          tf.random.normal([3, 4, 5], seed=test_util.test_seed()),
          shape=None,
      )
      self.assertAllEqual(3 * 4 * 5, self.evaluate(ps.size(x)))
  
imports: from absl.testing import parameterized
  import numpy
  import tensorflow.compat.v1
  import tensorflow.compat.v2
  from tensorflow_probability.python.internal import dtype_util
  from tensorflow_probability.python.internal import prefer_static
  from tensorflow_probability.python.internal import test_util
label_desc: Use image node_id 2 for calling the SizeTest obj's underlying member method code with example usage: obj.test_dynamic() without return types