040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree f73534cbd2220f504484d99961619cf54330c22d	protocol
040000 tree 8b612fe71933ea797b46f90db743faee570c7091	types
040000 tree baeee2c9faf9f0ae1ebdcb29433d4d34fe935d18	util