040000 tree 5c1ca6ed9c7c210b68166780f89e0c6062a6b88d	annotations
040000 tree 5de008069ba6ff8c71e7470c60a8b0ec2cd35d2e	exceptions
040000 tree 39952627a2b17c727c6b93c58634c2e0d45cd4be	protocol
040000 tree 55a148f36da6b28736dc7e9b89541a3cb90c6614	types
040000 tree 20baf244ef178a083259723cbcdec0e9ca07aefc	util