Necessity of fuse

[tmaxmax]

In Rust, the iterator method fuse exists. It returns an iterator that will keep returning None after the first None. But while in Rust, Iterator's [next] method returns an Option, in Javascript next returns a value and a done flag, that indicates the end of the iterator. Because of this, Javascript's iterator are semantically already fused, rendering the method fuse useless. Although it could be used to turn an iterator over Option<T> (alias for T | null in our codebase), I think it wouldn't be semantically the same with Rust's fuse. Besides that, given the lack of generic specialization in Typescript, implementing it this way would be problematic.

Should the fuse method be implemented, then?