code: def init_db(engine: Engine):
      """initializes the database to create all of the tables defined by the
      orm objects declared here if they do not already exist.
      """
      Base.metadata.create_all(engine)
  
imports: import json
  from collections import OrderedDict
  from datetime import datetime
  from enum import Enum
  from typing import Any, Dict, List, Optional
  import sqlalchemy
  from sqlalchemy import JSON, Column, DateTime, ForeignKey, Integer, String
  from sqlalchemy.engine.base import Engine
  from sqlalchemy.ext.declarative import declarative_base
  from sqlalchemy.orm import Session, backref, relationship, sessionmaker
  from sqlalchemy.orm.session import object_session
  from caliban.util import current_user
label_desc: Use image node_id 1 for calling a global function with example usage: init_db(engine) without return types