code: def extend_partial(self, times, obs_times, obs_losses, config=None):
      """
      extends a partially observed curve
  
      Parameters:
      -----------
  
      times: numpy array
          times where to predict the loss
      obs_times: numpy array
          times where the curve has already been observed
      obs_losses: numpy array
          corresponding observed losses
      config: numpy array
          numerical reperesentation of the config; None if no config
          information is available
  
      Returns:
      --------
  
      mean and variance prediction at input times
  
  
      """
  
label_desc: Use image node_id 3 for calling the LCModel obj's underlying member method code with example usage: obj.extend_partial(times, obs_times, obs_losses, config) without return types