code: def process(self, messages: List[Message]) -> List[Message]:
      # TODO: This is the method which Rasa Open Source will call during inference.
      ...
      return messages
  
file_path: rasa/data/test_classes/nlu_component_skeleton.py
imports: from typing import Dict, Text, Any, List
  from rasa.engine.graph import GraphComponent, ExecutionContext
  from rasa.engine.recipes.default_recipe import DefaultV1Recipe
  from rasa.engine.storage.resource import Resource
  from rasa.engine.storage.storage import ModelStorage
  from rasa.shared.nlu.training_data.message import Message
  from rasa.shared.nlu.training_data.training_data import TrainingData
label_desc: Use image node_id 4 for calling the CustomNLUComponent obj's underlying member method code with example usage: obj.process(messages) and returns: messages