code: def get_gru_cell(gru):
      gru_cell = nn.GRUCell(gru.input_size, gru.hidden_size)
      gru_cell.weight_hh.data = gru.weight_hh_l0.data
      gru_cell.weight_ih.data = gru.weight_ih_l0.data
      gru_cell.bias_hh.data = gru.bias_hh_l0.data
      gru_cell.bias_ih.data = gru.bias_ih_l0.data
      return gru_cell
  
imports: import sys
  import torch
  import torch.nn
  import numpy
  import torch.nn.functional
  import time
  from TTS.utils.audio import AudioProcessor
  from TTS.vocoder.utils.distribution import sample_from_gaussian, sample_from_discretized_mix_logistic
label_desc: Use image node_id 6 for calling the WaveRNN obj's underlying member method code with example usage: obj.get_gru_cell(gru) and returns: gru_cell