Method __iadd__

lib/sqlalchemy/ext/mutable.py:948–950

(self, x: Iterable[_T])

        self.changed()

    def __iadd__(self, x: Iterable[_T]) -> MutableList[_T]:  # type: ignore[override,misc] # noqa: E501
        self.extend(x)
        return self

    def insert(self, i: SupportsIndex, x: _T) -> None:
        list.insert(self, i, x)