code: def run_migrations_online() -> None:
      """Run migrations in 'online' mode."""
  
      asyncio.run(run_async_migrations())
  
file_path: alembic/alembic/templates/async/env.py
imports: import asyncio
  from logging.config import fileConfig
  from sqlalchemy import pool
  from sqlalchemy.engine import Connection
  from sqlalchemy.ext.asyncio import async_engine_from_config
  from alembic import context
label_desc: Use image node_id 3 for calling a global function with example usage: run_migrations_online() without return types