code: def test_encoder_on_cuda(self):
      pass
  
file_path: lightwood/tests/unit_tests/encoder/text/test_rnn.py
imports: import unittest
  from lightwood.encoder.text import RnnEncoder
  import pandas
label_desc: Use image node_id 3 for calling the TestRnnEncoder obj's underlying member method code with example usage: obj.test_encoder_on_cuda() without return types