code: def get_memory_usage(self):
      return 0
  
imports: import logging
  from collections import namedtuple
  import numpy
  from caffe2.proto import caffe2_pb2
  from caffe2.python import core, schema, scope, utils, workspace
  from caffe2.python.layers.tags import TagContext
label_desc: Use image node_id 12 for calling the ModelLayer obj's underlying member method code with example usage: obj.get_memory_usage() and returns: int