Removes some external inconsistency dangers from our collections.

Sometimes external collections can change unexpectedly; this change makes us call foreign collections fewer times to protect us from the possibility of inconsistency.

Review by: rice

git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@7284 8db76d5a-ed1c-0410-87a9-c151d255dfc7
3 files changed