code: def test_jacobians(self):
      for observed_dim in [0, 5]:
          for input_dim in [2, 3, 5, 7, 9, 11]:
              self._test_jacobian(
                  input_dim, observed_dim, 3 * input_dim + 1, 2
              )
  
file_path: pyro/tests/nn/test_autoregressive.py
imports: from unittest import TestCase
  import pytest
  import torch
  from pyro.nn import AutoRegressiveNN, ConditionalAutoRegressiveNN
  from pyro.nn.auto_reg_nn import create_mask
label_desc: Use image node_id 4 for calling the AutoRegressiveNNTests obj's underlying member method code with example usage: obj.test_jacobians() without return types