040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 94c9fbd05725b34bc239d3795d2c4763da4cc966	protocol
040000 tree 27ebab7b44ebc81394f018b9242d65fa482dfe1f	types
040000 tree 6f49b38c061518635aabd32969644dfcd5758957	util