040000 tree dac2f4d4236b66d7a3d0dd318f74c24e43032b16	exceptions
040000 tree d80ba3874a0cf97c696e710f3ecf92bcbab3d316	protocol
040000 tree 448b1f798ed623de4313ac8bc7eecf10174769d5	types
040000 tree db99a2b6175fe2df40dacb69857ab163003473c2	util