040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 142a8d6ca3d5a1cee65a1d12a154b2132e0d41d0	protocol
040000 tree 7d45c51afbe0bbadfe84b45a606dd31ab1b4556e	types
040000 tree 43297d7be50d227659d891014cb12141764dca89	util