code: def get_node(self, name):
      try:
          return self.node_lut[name]
      except KeyError:
          raise ConversionError("Layer not found: %s" % name)
  
imports: from collections import namedtuple
  from functools import reduce
  from google.protobuf import text_format
  from copy import deepcopy
  import numbers
  import os
  import tempfile
  from mmdnn.conversion.caffe.mapper import get_handler_name
  from mmdnn.conversion.caffe.resolver import get_caffe_resolver, has_pycaffe
  from mmdnn.conversion.caffe.shape import *
  from mmdnn.conversion.caffe.errors import print_stderr, ConversionError
label_desc: Use image node_id 3 for calling the CaffeGraph obj's underlying member method code with example usage: obj.get_node(name) and returns: self