code: def setup(self):
      in_dtype1, in_dtype2 = self.in_dtypes
  
      kind1 = numpy.dtype(in_dtype1).kind
      kind2 = numpy.dtype(in_dtype2).kind
      if kind1 != "f" or kind2 != "f":
          self.skip_backward_test = True
          self.skip_double_backward_test = True
  
      if in_dtype1 == "float16" or in_dtype2 == "float16":
          self.check_forward_options.update(
              {"rtol": 1e-3, "atol": 1e-3}
          )
          self.check_backward_options.update(
              {"rtol": 1e-2, "atol": 3e-3}
          )
          self.check_double_backward_options.update(
              {"rtol": 1e-2, "atol": 3e-3}
          )
  
imports: import unittest
  import numpy
  import chainerx
  from chainerx_tests import array_utils
  from chainerx_tests import dtype_utils
label_desc: Use image node_id 1 for calling the BinaryMathTestBase obj's underlying member method code with example usage: obj.setup() without return types