This is necessary to support mapper functions, such as `map`, `filter` and `filter_map`, both on containers and iterators. A design [similar to Rust](https://doc.rust-lang.org/stable/reference/items/associated-items.html) is probably the way to go.
This is necessary to support mapper functions, such as
map,filterandfilter_map, both on containers and iterators.A design similar to Rust is probably the way to go.