040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 89bf30ddcd556319fae948d831f7efb92273d278	protocol
040000 tree c21dd7da59d4df3d0ea3bc3bb316216bf0e6d322	types
040000 tree fd5997b7fe6feeda6a12f948ec5ab42a4d3a1a91	util