040000 tree aa7547990daaf8489dbefdf2d32a1d767b7ec1e0	general
040000 tree c807bfb8fe77f3008953804e4afff9b8d0fc468c	hit-testing
040000 tree a0877f818d0e7e23db67f870a362b49a392a7b5a	point-mapping