code: def fk_guid(
      constraint: Union[Constraint, Index], table: Table
  ) -> str:
      return "foo"
  
imports: from typing import Union
  from sqlalchemy import CheckConstraint
  from sqlalchemy import Constraint
  from sqlalchemy import Index
  from sqlalchemy import MetaData
  from sqlalchemy import Table
label_desc: Use image node_id 1 for calling a global function with example usage: fk_guid(constraint, table) and returns: str