040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 68dbe3e03d41d978793ef09d7d376b980e220222	protocol
040000 tree aa7d67a3c69524f7ebce358e72af64d7393af10b	types
040000 tree 4fe8d0d456195fbc560a80dc1f567e317698b41c	util