class_docstr: Tests the get_rnn_cell function.
    
class_docstr_tok: ["Tests","the","get_rnn_cell","function","."]
code: def test_multi_layer(self):
      cell = training_utils.get_rnn_cell(
          cell_class="BasicLSTMCell",
          cell_params={"num_units": 16},
          num_layers=2,
      )
      self.assertIsInstance(cell, rnn_cell.ExtendedMultiRNNCell)
      self.assertEqual(cell.output_size, 16)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import tempfile
  import tensorflow
  import numpy
  from seq2seq.contrib import rnn_cell
  from seq2seq.data import input_pipeline
  from seq2seq.test import utils
  from seq2seq.training import utils
label_desc: Use image node_id 2 for calling the TestGetRNNCell obj's underlying member method code with example usage: obj.test_multi_layer() without return types