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040000 tree 138c9ec99adf3b3986e4e1e3ee8228cc6d9e529b	java
040000 tree a3758cbd367f99c4e0bcccfb0b1131df9362a13c	native
040000 tree 4e0643712646e38e7f12ddf0e4869b640fc02b3d	protobuf
040000 tree 45aeb1cee939ce2e582f72d9d06657a58416b1fc	tools