040000 tree 4750b907b2566ba3a499d1a30a7c55611de65263	exceptions
040000 tree d79f111fb8061e8133cc44d8149f5ae1f94cb5d8	protocol
040000 tree 0fd27aa153b0436fc54b83c7b8867181fe357d63	types
040000 tree 8ef25cd7fc5c854e8178a8295876444131e19961	util