code: def test_list_of_float128(self):
      self.run_test(
          "def list_of_float128(l): return [2. * _ for _ in l]",
          [np.float128(1.0), np.float128(2.0)],
          list_of_float128=[List[np.float128]],
      )
  
imports: import numpy
  import unittest
  from pythran.typing import *
  from pythran.tests import TestEnv
label_desc: Use image node_id 8 for calling the TestConversion obj's underlying member method code with example usage: obj.test_list_of_float128() without return types