code: def test_variable_is_Typed_List_variable(self):
      mySymbolicVariable = TypedListType(
          TensorType(pytensor.config.floatX, shape=(None, None))
      )()
  
      assert isinstance(mySymbolicVariable, TypedListVariable)
  
imports: import numpy
  import pytest
  import pytensor
  from pytensor.tensor.type import TensorType
  from pytensor.typed_list.basic import TypedListVariable
  from pytensor.typed_list.type import TypedListType
  from tests.tensor.utils import random_ranged
label_desc: Use image node_id 13 for calling the TestTypedListType obj's underlying member method code with example usage: obj.test_variable_is_Typed_List_variable() without return types