code: def test_control_flow1(self):
      def fn(a, b):
          c1 = a - b
          c2 = b - a
          if c1.sum() > c2.sum():
              return c1
          else:
              return c2
  
      self._common(fn, 1, 5)
  
imports: from unittest.mock import patch
  import torch
  import torch._dynamo.test_case
  import torch._dynamo.testing
  from torch._dynamo.testing import unsupported
  from torch._dynamo.utils import ifdynstaticdefault
label_desc: Use image node_id 2 for calling the SubGraphTests obj's underlying member method code with example usage: obj.test_control_flow1() and returns: c1, c2