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040000 tree 3e1c64e25f380d9f41254247bbf23954b5a61e0f	closure
040000 tree 2441d898c480abd70c0207a8714bc4d9c584a2e4	compiler
040000 tree 67cd5958a7dfccb8430fc4b2f2484ad5549d52f3	js_ast