code: def quote_identifier(identifier: str,
                       mixed: Union[SQLCompiler, Engine, Dialect]) -> str:
      
      # See also http://sqlalchemy-utils.readthedocs.io/en/latest/_modules/sqlalchemy_utils/functions/orm.html  # noqa
      return get_preparer(mixed).quote(identifier)
docs: Converts an SQL identifier to a quoted version, via the SQL dialect in
      use.
  
      Args:
          identifier: the identifier to be quoted
          mixed: an SQLAlchemy :class:`SQLCompiler`, :class:`Engine`, or
              :class:`Dialect` object
  
      Returns:
          the quoted identifier