Instance Messenger base classes for protocol support.
You will find these useful if you're adding a new protocol to IM.
| Class | AbstractGroup | No class docstring; 0/2 instance variables, 2/7 methods documented |
| Class | AbstractPerson | No class docstring; 0/3 instance variables, 2/5 methods documented |
| Class | AbstractClientMixin | Designed to be mixed in to a Protocol implementing class. |
| Class | AbstractAccount | Base class for Accounts. |