040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 48d62cc4b0dd9c53eaf7a003ea2b1d3d41735434	protocol
040000 tree 3a8abe871b98e78fa66708ac4ce4576d0b787a72	types
040000 tree 43297d7be50d227659d891014cb12141764dca89	util