040000 tree 4750b907b2566ba3a499d1a30a7c55611de65263	exceptions
040000 tree c77150d87459b524744264af92d22a54eee7cd90	protocol
040000 tree 0fd27aa153b0436fc54b83c7b8867181fe357d63	types
040000 tree 8ef25cd7fc5c854e8178a8295876444131e19961	util