code: def test_big_void(self):
      big_void_1 = NeuralType(elements_type=VoidType())
      big_void_2 = NeuralType()
  
      btc_spctr = NeuralType(("B", "T", "C"), SpectrogramType())
      btc_spct_bad = NeuralType(("B", "T"), SpectrogramType())
      t1 = NeuralType(
          axes=(
              AxisType(kind=AxisKind.Batch, size=None, is_list=True),
              AxisType(kind=AxisKind.Time, size=None, is_list=True),
              AxisType(kind=AxisKind.Dimension, size=32, is_list=False),
              AxisType(
                  kind=AxisKind.Dimension, size=128, is_list=False
              ),
              AxisType(
                  kind=AxisKind.Dimension, size=256, is_list=False
              ),
          ),
          elements_type=ChannelType(),
      )
      t2 = NeuralType(
          axes=(
              AxisType(kind=AxisKind.Batch, size=None, is_list=False),
              AxisType(kind=AxisKind.Time, size=None, is_list=False),
              AxisType(kind=AxisKind.Dimension, size=32, is_list=False),
              AxisType(
                  kind=AxisKind.Dimension, size=128, is_list=False
              ),
              AxisType(
                  kind=AxisKind.Dimension, size=256, is_list=False
              ),
          ),
          elements_type=ChannelType(),
      )
  
      assert (
          big_void_1.compare(btc_spctr)
          == NeuralTypeComparisonResult.SAME
      )
      assert (
          big_void_1.compare(btc_spct_bad)
          == NeuralTypeComparisonResult.SAME
      )
      assert big_void_1.compare(t1) == NeuralTypeComparisonResult.SAME
      assert big_void_1.compare(t2) == NeuralTypeComparisonResult.SAME
  
      assert (
          big_void_2.compare(btc_spctr)
          == NeuralTypeComparisonResult.SAME
      )
      assert (
          big_void_2.compare(btc_spct_bad)
          == NeuralTypeComparisonResult.SAME
      )
      assert big_void_2.compare(t1) == NeuralTypeComparisonResult.SAME
      assert big_void_2.compare(t2) == NeuralTypeComparisonResult.SAME
  
file_path: NeMo/tests/core/test_neural_types.py
imports: import pytest
  from nemo.core.neural_types import AcousticEncodedRepresentation, AudioSignal, AxisKind, AxisKindAbstract, AxisType, ChannelType, ElementType, MelSpectrogramType, MFCCSpectrogramType, NeuralType, NeuralTypeComparisonResult, SpectrogramType, VoidType
label_desc: Use image node_id 9 for calling the TestNeuralTypeSystem obj's underlying member method code with example usage: obj.test_big_void() without return types