040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 89bf30ddcd556319fae948d831f7efb92273d278	protocol
040000 tree 9995a52da27995232041c3c3e353a5bc235f2347	types
040000 tree 4fe8d0d456195fbc560a80dc1f567e317698b41c	util