040000 tree c885a75dfb17f01f111d21acb974355230bdcee9	common
040000 tree cd1f73524e347e938277fd439f2b209a952c9ce6	examples
040000 tree 9cbe099700d03c5534eb7dce92577da2344adba8	io
040000 tree ca8fc1a74b427353a3aaada9646d8def025ec9ff	protocol
040000 tree 00f73679e71df8cd91050e08bba0b919b9c6b8f0	util