code: def downgrade():
      # We don't know state to downgrade
      raise NotImplementedError()
  
imports: import datetime
  from alembic.autogenerate import produce_migrations, render, api
  from alembic import context
  from sqlalchemy import UniqueConstraint
  from sqlalchemy.orm import declarative_base
  from sqlalchemy import Column, Integer, String, DateTime, Boolean, Index
  from alembic import op
  import sqlalchemy
  import mindsdb.interfaces.storage.db
  from mindsdb.interfaces.storage.db import Json, Array
  from mindsdb.utilities import log
label_desc: Use image node_id 2 for calling a global function with example usage: downgrade() without return types