class_docstr: CrypTensor class that uses plaintext PyTorch tensors as underlying backend.
  This class should be used for testing purposes.
code: def get_plain_text(self):
      return self._tensor
  
imports: import torch
  from crypten import CrypTensor, register_cryptensor
label_desc: Use image node_id 2 for calling the PyTorchTensor obj's underlying member method code with example usage: obj.get_plain_text() and returns: self