040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 6ffdb3a92e5ec9a3f6537e0527266074e431d52e	protocol
040000 tree d3f0ffd74aac52a7309dd3548135a6fa0e9e2329	types
040000 tree 1e99b96fcbcdc679ea64ef107116d3f905eec514	util