code: def output_dim(self, auxiliary_output=None):
      return self.config["small-dim"]
  
imports: from __future__ import print_function
  import math
  import re
  import sys
  from libs.nnet3.xconfig.basic_layers import XconfigLayerBase
label_desc: Use image node_id 6 for calling the XconfigPrefinalLayer obj's underlying member method code with example usage: obj.output_dim(auxiliary_output) and returns: self