Method embedded

lib/sqlalchemy/sql/base.py:1764–1774

(
        self,
        target_set: Union[
            Set[ColumnElement[Any]], FrozenSet[ColumnElement[Any]]
        ],
    )

                del pi[col]

    def embedded(
        self,
        target_set: Union[
            Set[ColumnElement[Any]], FrozenSet[ColumnElement[Any]]
        ],
    ) -> bool:
        expanded_proxy_set = self.column._expanded_proxy_set
        for t in target_set.difference(expanded_proxy_set):
            if not expanded_proxy_set.intersection(_expand_cloned([t])):
                return False
        return True


class ColumnCollection(Generic[_COLKEY, _COL_co]):