code: def output_schema(self, output_schema):
      assert self._output_schema is None
      self._output_schema = output_schema
  
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 9 for calling the ModelLayer obj's underlying member method code with example usage: obj.output_schema(output_schema) without return types