code: def add_event_as_condition(self, event: Event) -> None:
      self.add_event(event, True)
  
file_path: rasa/rasa/shared/core/training_data/story_reader/story_step_builder.py
imports: import logging
  from typing import Text, Optional, Dict, Any, List
  import rasa.shared.core.training_data.structures
  import rasa.shared.utils.io
  from rasa.shared.constants import DOCS_URL_STORIES
  from rasa.shared.core.events import UserUttered, Event
  from rasa.shared.core.training_data.structures import Checkpoint, GENERATED_CHECKPOINT_PREFIX, GENERATED_HASH_LENGTH, STORY_START, StoryStep, RuleStep
label_desc: Use image node_id 6 for calling the StoryStepBuilder obj's underlying member method code with example usage: obj.add_event_as_condition(event) without return types