Add token to the set of tokens for which this connection will emit
clients_interested and
clients_uninterested.
This method must be called from the ObjectClass.constructed or ObjectClass .constructor callback (otherwise, it will run too late to be useful).
| this |
a connection |
| token |
a quark corresponding to a D-Bus interface, or a token representing part of a D-Bus interface, for which this connection wishes to be notified when clients register an interest |