040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 775903478605ea79d195b6dc65f2df7dd3df0e79	protocol
040000 tree 0d9ab4cac49ac842b039729849a793cfeb5b85ab	types
040000 tree 29642ded176165194ab08618261d596c1800439a	util