040000 tree 1c5d7a8c0b1cf8ff201cefb82d529d2f4d1b3c0a	goodbye_dart
040000 tree 6996ba4e73377522d403ee48cd26a37e97e98d77	greeting
040000 tree 3fb7136ab425ec1f7ee05c94d71cbd439d92afbc	hello_app_dart
040000 tree c16f87fd27e4f94281276b0a62f469fdc9c60e9b	hello_dart