forcedotcom/phoenix — pull request #489 by aaraujo (2013-10-21 19:51:29+00:00)
Title: Simplified FindBugs fix for atomic correctness (AT)

Reverted to original code + putIfAbsent. Although atomic correctness here is not strictly necessary
(worst case would be an overwrite of a resolved class), the resolve method is synchronized and putIfAbsent
will not overwrite values for the same class/key. Added a FindBugs @SuppressWarnings annotation + doc so the fix is clear.