040000 tree 96c36dd533e639e8ecff215601b79033d22e0d0d	io
040000 tree aedaa8991b7d3612a1ed77bc36767dc62b83dcc1	lang
040000 tree de59b1c4df107a50b56a97c70d4bfae5e571bffb	net
040000 tree 1c4b2f7b1e99482194fcd8eec3b6e026ac5fd31f	nio
040000 tree 3ebbe520f702b58287259ce1db6b0ad0199429c6	util