040000 tree b98be1724a29e3728351f4a8689e2fcd975b5f3c	exceptions
040000 tree c45dcdedda52775901d238f110396ec5208e7608	protocol
040000 tree 4acf1b1ab30cc3de45bdfc803cb3f611a369e90d	types
040000 tree 8266e4d0954973d646f402a5d8b0920816911879	util