`ArrayVec` should have a method equivalent to [`Vec::pop_if`](https://doc.rust-lang.org/std/vec/struct.Vec.html#method.pop_if), that allows popping the last element based on a predicate, without an extra `unwrap()`.
ArrayVecshould have a method equivalent toVec::pop_if, that allows popping the last element based on a predicate, without an extraunwrap().