code: def output_schema(self):
      if self.request_only:
          set_request_only(self._output_schema)
      self._check_output_schema()
      return self._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 8 for calling the ModelLayer obj's underlying member method code with example usage: obj.output_schema() and returns: self