code: def run_migrations_offline() -> None:
      """Run migrations in 'offline' mode.
  
      This configures the context with just a URL
      and not an Engine, though an Engine is acceptable
      here as well.  By skipping the Engine creation
      we don't even need a DBAPI to be available.
  
      Calls to context.execute() here emit the given string to the
      script output.
  
      """
      url = config.get_main_option("sqlalchemy.url")
      context.configure(url=url)
  
      with context.begin_transaction():
          context.run_migrations()
  
file_path: superset/superset/migrations/env.py
imports: import logging
  import urllib.parse
  from logging.config import fileConfig
  from alembic import context
  from alembic.operations.ops import MigrationScript
  from alembic.runtime.migration import MigrationContext
  from flask import current_app
  from flask_appbuilder import Base
  from sqlalchemy import engine_from_config, pool
label_desc: Use image node_id 1 for calling a global function with example usage: run_migrations_offline() without return types