040000 tree 766e6906ca8226a3ce0e5296ceab12fc8fc654a4	exceptions
040000 tree 17b5c9bdf809025b9b873e54f4ebf46fb8b15fc9	protocol
040000 tree 0a9254ba5747a0d60e4ca271259c51f25289b732	types
040000 tree 2106bb56dba34e14b6ac34f535fcf475f4358993	util