code: def qz_x_params(self):
      if self._qz_x_params is None:
          raise NameError("qz_x params not initalised yet!")
      return self._qz_x_params
  
file_path: mmvae/src/models/vae.py
imports: import torch
  import torch.nn
  from utils import get_mean, kl_divergence
  from vis import embed_umap, tensors_to_df
label_desc: Use image node_id 3 for calling the VAE obj's underlying member method code with example usage: obj.qz_x_params() and returns: self