040000 tree 637f070e06960c3d376b516755892af00cef2276	ffi
100644 blob fd4ae326db43dd44026f4f0b1c76f9155fef5736	hal.rs
100644 blob faa30a94ba323239980720a8115cc39eb04f66b6	hidl_hal.rs
100644 blob 3376e535c64522c174051eae02df6c26aa86dbce	rootcanal_hal.rs