| ⇢ | A | tutorial_1 added | 
| ⇢ | A | tutorial_1.GripperInterface.__init__() added | |
| ⇢ | A | tutorial_1.approach_object() added | |
| ⇢ | A | tutorial_1.GripperInterface.close() added | |
| ⇢ | A | tutorial_1.GripperInterface.open() added | |
| ⇢ | A | tutorial_1.check_battery() added | |
| ⇢ | A | tutorial_1.say_hello() added |