code: def get_x(self, in_type=None):
      base_x = (
          input_generator.increasing(1, 5),
          input_generator.increasing(1, 5) * 1.1,
          input_generator.increasing(1, 5) * 1.2,
      )
      names = ["x", "y", "z"]
      if in_type is None:
          return base_x
      elif in_type == "list":
          return list(base_x)
      elif in_type == "variable":
          return tuple(chainer.Variable(v) for v in base_x)
      elif in_type == "variable_list":
          return [chainer.Variable(v) for v in base_x]
      elif in_type == "dict":
          return {names[i]: v for i, v in enumerate(base_x)}
      elif in_type == "variable_dict":
          return {
              names[i]: chainer.Variable(v)
              for i, v in enumerate(base_x)
          }
  
imports: import unittest
  import chainer
  import chainer.functions
  import chainer.links
  from chainer import testing
  import numpy
  import pytest
  from onnx_chainer import export
  from onnx_chainer.export import RetainInputHook
  from onnx_chainer.testing import input_generator
  from onnx_chainer_tests.helper import ONNXModelTest
label_desc: Use image node_id 2 for calling the TestMultipleInputs obj's underlying member method code with example usage: obj.get_x(in_type) and returns: base_x, list, tuple, unknown, unknown, unknown