code: def test_gain_relu_he_normal_scale(self):
      he_initializer = init.HeNormal(gain=1, seed=0)
      sample_1 = self.eval(he_initializer.sample((4, 4)))
  
      he_initializer = init.HeNormal(gain=2, seed=0)
      sample_2 = self.eval(he_initializer.sample((4, 4)))
  
      self.assertAlmostEqual(
          np.mean(sample_2 / sample_1), math.sqrt(2), places=5
      )
  
imports: import math
  from scipy import stats
  import numpy
  from neupy import init
  from neupy.init import identify_fans
  from base import BaseTestCase
label_desc: Use image node_id 1 for calling the InitializerWithGainTestCase obj's underlying member method code with example usage: obj.test_gain_relu_he_normal_scale() without return types