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. |