040000 tree 4c5b234f9fe575254cbbbec2dd227c789fddd1f7	annotations
040000 tree fc2061d7eba98c4e0a4224356f71642a071bb115	exceptions
040000 tree 34170db9118925db2365fb415e36875617302353	protocol
040000 tree 14e6446cbafe406a3e75956a741933b3bbda5394	types
040000 tree 3f5f2fac50bee894a512b7a76935c0490df19177	util