040000 tree 047962ea2000ccaff817085569e6f34ea80bca88	collect
040000 tree a6096d906614d4122b35657dcdc94c6ed7ed8b51	escape
040000 tree 7adcb9394bac871e5df4f46c8b0aacb2fb7a8fdd	testing
040000 tree 17ae8228cfd21a65e8c697b5218fe2a3e3955834	util