code: def testPrng(self):
      self.assertAllEqual(
          tf_np.asarray(123, np.int64), extensions.prng(123)
      )
  
imports: import functools
  import itertools
  from absl import flags
  from absl.testing import parameterized
  from jax import lax
  import numpy
  import tensorflow.compat.v2
  from trax.tf_numpy import extensions
  import trax.tf_numpy.numpy
label_desc: Use image node_id 27 for calling the ExtensionsTest obj's underlying member method code with example usage: obj.testPrng() without return types