Part of kiwi
| Class | Interface | Undocumented |
| Class | Attribute | Undocumented |
| Function | implements | Undocumented |
| Class | AlreadyImplementedError | Called when a utility already exists. |
| Class | _UtilityHandler | Undocumented |
| Function | provide_utility | Set the utility for the named interface. If the utility is already |
| Function | get_utility | Get the utility for the named interface. If the utility is not |
| Function | remove_utility | Remove the utility provided for an interface |
| Parameters | iface | interface to set the utility for. |
| utility | utility providing the interface. |