isNewIdentifierLocation is set in the syntax server #39033Description
In #37713, we might not have a full picture of the world, so it might overly restrictive to only suggest identifiers in the current file. We should consider being more permissive so that editors don't aggressively auto-complete on identifiers in these contexts.
Aside: if we do this, we should make sure that the work done in #38836 doesn't cause conflicts.
For example, let's say you have an empty file like
thing/**/and completions get triggered at /**/. A user should not get completions for thing at that point.