code: def _setup_data_with_context(self):
      yield Message(self._add_context(EXAMPLE1))
      yield Message(EXAMPLE2)
      yield Message(self._add_context(EXAMPLE3))
      yield Message(EXAMPLE4)
  
imports: import unittest
  from parlai.core.params import ParlaiParser
  from parlai.core.opt import Opt
  from parlai.core.teachers import create_task_agent_from_taskname
  from parlai.core.message import Message
label_desc: Use image node_id 2 for calling the TestSpecificMutators obj's underlying member method code with example usage: obj._setup_data_with_context() without return types