Scope root = Scope::NewRootScope();
  auto add = Add(root.WithKernelLabel("AddWithKernelLabel"), 1.0f, 2.0f);
  TF_EXPECT_OK(root.status());
  AttrSlice attrs = add.z.op().node()->attrs();
  const auto* kernel_attr = attrs.Find("_kernel");
  ASSERT_TRUE(kernel_attr);
  TF_EXPECT_OK(AttrValueHasType(*kernel_attr, "string"));
  EXPECT_EQ(kernel_attr->s(), "AddWithKernelLabel");
}

TEST(CCOpTest, ColocateWith) {