Method __iadd__

lib/sqlalchemy/ext/associationproxy.py:1645–1647

(self, iterable: Iterable[_T])

        return n * list(self)

    def __iadd__(self, iterable: Iterable[_T]) -> Self:
        self.extend(iterable)
        return self

    def __imul__(self, n: SupportsIndex) -> Self:
        # unlike a regular list *=, proxied __imul__ will generate unique