040000 tree ffc8c9f563a63f54f238f3d33eb04a0346bfb5bb	demo
100644 blob 792b7b002e5e0364e3efd391e5bc5c0ad331419a	machine.go
100644 blob e0cbb00f23703687147f36bdd28229556a645b0f	machine_test.go