040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree d7e9e5dcb01b3231613e5adf55941cbe04c31897	protocol
040000 tree 747fa0157e51858326c2045d62aa92b7d727577e	types
040000 tree 43297d7be50d227659d891014cb12141764dca89	util