class_docstr: Make sure we can load an agent from internal.
class_docstr_tok: ["Make","sure","we","can","load","an","agent","from","internal","."]
code: def test_load_internal_agent(self):
      agent_module = load_agent_module("internal:parrot")
      assert agent_module, "Could not load internal agent"
  
imports: import os
  import shutil
  import unittest
  import pytest
  from parlai.agents.repeat_label.repeat_label import RepeatLabelAgent
  import parlai.tasks.convai2.agents
  from parlai.tasks.convai2.worlds import InteractiveWorld, SelfChatWorld
  from parlai.core.loader import load_agent_module, load_task_module, load_teacher_module, load_world_module
  from parlai.core.worlds import DialogPartnerWorld
  import parlai.utils.testing
label_desc: Use image node_id 2 for calling the TestLoadParlAIInternal obj's underlying member method code with example usage: obj.test_load_internal_agent() without return types