code: def register_layer(name, layer):
      assert name not in _LAYER_REGISTRY, "{0} already exists".format(
          name
      )
      _LAYER_REGISTRY[name] = layer
  
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 6 for calling a global function with example usage: register_layer(name, layer) without return types