040000 tree 5c1ca6ed9c7c210b68166780f89e0c6062a6b88d	annotations
040000 tree 5de008069ba6ff8c71e7470c60a8b0ec2cd35d2e	exceptions
040000 tree 6ff9bc7c8fc02caf2c8bf47b232278a2cf357243	protocol
040000 tree 93fe53867786527176c37c1d96b58f8af8df50a6	types
040000 tree 4d46282eadffe24ab3d35d59645d63d2281016f6	util