code: def process_validate(self, *args):
      super(MixupAcc, self).process_validate(*args)
  
      return self.cat_acc.process(*args)
  
file_path: torchbearer/torchbearer/callbacks/mixup.py
imports: import torch
  import torch.nn.functional
  from torch.distributions.beta import Beta
  import torchbearer
  from torchbearer import cite
  from torchbearer.callbacks import Callback
  from torchbearer.metrics import CategoricalAccuracy, AdvancedMetric, running_mean, mean, super
  from torchbearer.metrics import default
label_desc: Use image node_id 3 for calling the MixupAcc obj's underlying member method code with example usage: obj.process_validate() and returns: self