code: def func(self, xp, a):
      scalar = self.scalar_type(self.scalar_value)
      return self.func_scalar(xp, a, scalar)
  
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 MathScalarTestBase obj's underlying member method code with example usage: obj.func(xp, a) and returns: self