class_docstr: Given a synthetic intermediate converesation, calculates the metrics for said
  conversation.
class_docstr_tok: ["Given","a","synthetic","intermediate","converesation",",","calculates","the","metrics","for","said","conversation","."]
code: def _process(self, t: TodAgentType, text: str):
      self.m.handle_message(
          {"text": f"{TOD_AGENT_TYPE_TO_PREFIX[t]}{text}"}, t
      )
  
imports: import unittest
  from parlai.core.tod.tod_core import STANDARD_API_NAME_SLOT, STANDARD_REQUIRED_KEY, STANDARD_OPTIONAL_KEY, TodStructuredRound, TodStructuredEpisode, TodAgentType, TOD_AGENT_TYPE_TO_PREFIX
  from parlai.core.tod.world_metrics import TodMetrics
  from parlai.core.tod.world_metrics_handlers import METRICS_HANDLER_CLASSES_TEST_REGISTRY
  import projects.tod_simulator.world_metrics.extended_world_metrics
label_desc: Use image node_id 2 for calling the TodMetricsTestHelper obj's underlying member method code with example usage: obj._process(t, text) without return types