Function map_collect_chunked_owned 

pub fn map_collect_chunked_owned<'l, Item, PerItemResult, Result>(
    items: Vec<Item>,
    f: impl Fn(Chunk<Item>) -> PerItemResult + Send + Sync,
) -> Result
where
    Item: Send + Sync,
    PerItemResult: Send + Sync + 'l,
    Result: FromIterator<PerItemResult>,