040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 249d4ba15f445efcffb361c8fbcbb4ca7fca7c95	protocol
040000 tree 7cc5f3770c404f604af551253f8c37a3e54e29ed	types
040000 tree 43297d7be50d227659d891014cb12141764dca89	util