040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 7b0665c20ef7293340943d69157929caf01450a6	protocol
040000 tree 761e6a4a458d620d3d634b33eed21de449255cca	types
040000 tree 29642ded176165194ab08618261d596c1800439a	util