code: def decode(self, z):
      z = self.post_quant_conv(z)
      dec = self.decoder(z)
      return dec
  
imports: import torch
  import pytorch_lightning
  import torch.nn.functional
  from contextlib import contextmanager
  from taming.modules.vqvae.quantize import VectorQuantizer2
  from ldm.modules.diffusionmodules.model import Encoder, Decoder
  from ldm.modules.distributions.distributions import DiagonalGaussianDistribution
  from ldm.util import instantiate_from_config
label_desc: Use image node_id 4 for calling the AutoencoderKL obj's underlying member method code with example usage: obj.decode(z) and returns: dec