code: def forward(
      self, arguments, outputs, device=None, outputs_to_retain=None
  ):
      assert len(self.inputs) == 2
  
      outputs[self.outputs[0]] = [
          a0 + 2 * a1 for a0, a1 in zip(*arguments)
      ]
      outputs[self.outputs[1]] = [
          2 * a0 + a1 for a0, a1 in zip(*arguments)
      ]
  
      return None
  
imports: import numpy
  import pytest
  import cntk
  from cntk.ops.functions import Function, UserFunction
  from .ops_test_utils import AA
label_desc: Use image node_id 3 for calling the MultiFreeDimensionOutputUserFunction obj's underlying member method code with example usage: obj.forward(arguments, outputs, device, outputs_to_retain) and returns: None