code: def test_operator(self, xp, dtype1, dtype2):
      return self.func
  
imports: import unittest
  import numpy
  from cupy import testing
  from cupy_tests.core_tests.fusion_tests import fusion_utils
label_desc: Use image node_id 1 for calling the TestFusionArrayOperator obj's underlying member method code with example usage: obj.test_operator(xp, dtype1, dtype2) and returns: self