[TYMorningCoffee]

Good point. It should be replaced with an if not empty check.

[sedatk]

An empty check wouldn't be thread-safe either.

[vips7L]

Hmm I don’t think we know that from the post. The list of unrelated objects could be immutable or mutable and never modified. An isEmpty check is 100% safe to be called concurrently in both those situations