code: def _create_graph(fontsize: int = 12) -> "networkx.MultiDiGraph":
      """Create a graph and adds the default nodes."""
      import networkx as nx
  
      graph = nx.MultiDiGraph()
      _add_default_nodes(graph, fontsize)
      return graph
  
imports: from collections import defaultdict, deque
  import random
  from typing import Any, Text, List, Deque, Dict, Optional, Set, TYPE_CHECKING, Union, cast
  import rasa.shared.utils.io
  from rasa.shared.constants import INTENT_MESSAGE_PREFIX
  from rasa.shared.core.constants import ACTION_LISTEN_NAME
  from rasa.shared.core.domain import Domain
  from rasa.shared.core.events import UserUttered, ActionExecuted, Event
  from rasa.shared.core.generator import TrainingDataGenerator
  from rasa.shared.core.training_data.structures import StoryGraph, StoryStep
  from rasa.shared.nlu.constants import ENTITY_ATTRIBUTE_VALUE, INTENT, TEXT, ENTITY_ATTRIBUTE_TYPE, INTENT_NAME_KEY
label_desc: Use image node_id 14 for calling a global function with example usage: _create_graph(fontsize) and returns: graph