R1:02f0c099fa25

Fix some minor Spaces method visibility issues

Summary: Ref T8377. These were picked up by tests.

Test Plan: `arc unit --everything`

Reviewers: btrahan

Reviewed By: btrahan

Subscribers: epriestley

Maniphest Tasks: T8377

Differential Revision: https://secure.phabricator.com/D13130