code: def agg(self, v1, v2):
      return v1.sum(), v2.prod()
  
imports: from typing import NamedTuple
  import numpy
  import pytest
  import pandas
  from ....None import dataframe
  from ....config import option_context
  from ....session import get_default_session
  from ....tests.core import require_cudf, require_cupy
  from ....utils import lazy_import, pd_release_version
  from ...None import CustomReduction, NamedAgg
  from ...base import to_gpu
label_desc: Use image node_id 2 for calling the MockReduction2 obj's underlying member method code with example usage: obj.agg(v1, v2) and returns: v1,  v2