pub fn upvars_mentioned_impl(
db: &dyn SourceDatabase,
owner: ExpressionStoreOwnerId,
) -> ThinHashMap<ExprId, Upvars, FxBuildHasher>pub fn upvars_mentioned_impl(
db: &dyn SourceDatabase,
owner: ExpressionStoreOwnerId,
) -> ThinHashMap<ExprId, Upvars, FxBuildHasher>