040000 tree 6014d30ddf2a09f7fdeb63010426ab13e4c21df6	exceptions
040000 tree 04940b340d06984cff2fa630de166a92746054a9	protocol
040000 tree 0a5553bc2bfcbc3fc2e7e6c9d2d6cec319df112f	types
040000 tree 23593c016acd9e7b7f5bc0ebe4e20a59f0e8000f	util