040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 6692be3982ddc6a4b45a3174ae6f2c8d648358eb	protocol
040000 tree 0cb1ff1464b4e438bc0b0f2cc0da8325d1641647	types
040000 tree 43297d7be50d227659d891014cb12141764dca89	util