040000 tree 5c1ca6ed9c7c210b68166780f89e0c6062a6b88d	annotations
040000 tree 5de008069ba6ff8c71e7470c60a8b0ec2cd35d2e	exceptions
040000 tree a7c7c583f643580f5519e7208e6332af4abd6b5b	protocol
040000 tree d3791921100070b83e05c02ca11fa7e9792dac39	types
040000 tree bdfea1a824e96b3be1ca4038667205218f88f4a9	util