code: def forward(self, *args, **kwargs):
      return self.elbo.differentiable_loss(
          self.model, self.guide, *args, **kwargs
      )
  
imports: import logging
  import warnings
  from abc import ABCMeta, abstractmethod
  import torch
  import pyro
  import pyro.poutine
  from pyro.infer.util import is_validation_enabled
  from pyro.poutine.util import prune_subsample_sites
  from pyro.util import check_site_shape
label_desc: Use image node_id 2 for calling the ELBOModule obj's underlying member method code with example usage: obj.forward() and returns: self