040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 81c67662ec979525fa4a66df72baa392ea429028	protocol
040000 tree 0869e89c4a41dbdf3d3db7b9179e3cd3c39e1e3b	types
040000 tree 3f5f2fac50bee894a512b7a76935c0490df19177	util