code: def generate_inputs(self):
      x1 = numpy.random.uniform(0.5, 1, self.x1_shape)
      x1 = x1.astype(self.x1_dtype)
      x2 = numpy.random.uniform(0.5, 1, self.x2_shape)
      x2 = x2.astype(self.x2_dtype)
      return x1, x2
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backend import CpuDevice
  import chainer.functions
  from chainer import testing
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestBatchMatMul obj's underlying member method code with example usage: obj.generate_inputs() and returns: x1,  x2