code: def testSquareplusZero(self, dtype):
      self.assertEqual(dtype(1), nn.squareplus(dtype(0), dtype(4)))
  
imports: import collections
  from functools import partial
  import itertools
  import unittest
  from absl.testing import absltest
  from absl.testing import parameterized
  import scipy.stats
  from jax._src import config
  from jax._src import core
  from jax._src import test_util
  from jax._src import ad_checkpoint
  from jax.test_util import check_grads
  from jax import nn
  from jax import random
  import jax
  import jax.numpy
label_desc: Use image node_id 11 for calling the NNFunctionsTest obj's underlying member method code with example usage: obj.testSquareplusZero(dtype) without return types