code: def setUp(self):
      self.e1_shape = (self.batch_size,) + self.in_shapes[0]
      self.e2_shape = (self.batch_size,) + self.in_shapes[1]
      self.e1_size = numpy.prod(self.in_shapes[0])
      self.e2_size = numpy.prod(self.in_shapes[1])
  
      self.check_backward_options = {"atol": 1e-5, "rtol": 1e-4}
      self.check_double_backward_options = {"atol": 1e-4, "rtol": 1e-3}
  
imports: import unittest
  import numpy
  import chainer
  from chainer import backend
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 1 for calling the TestBilinearFunction obj's underlying member method code with example usage: obj.setUp() without return types