Function try_from_trusted_iterator 

fn try_from_trusted_iterator<T, R, const N: usize>(
    iter: impl UncheckedIterator<Item = R>,
) -> <R::Residual as Residual<[T; N]>>::TryType
where
    R: Try<Output = T>,
    R::Residual: Residual<[T; N]>,