040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree b81424a757436c884c7e3ececf5566aca2d842ce	protocol
040000 tree 289f49697b9046c8e5df1e47b165b1831923cd6b	types
040000 tree 6f49b38c061518635aabd32969644dfcd5758957	util