ActorCallbackSetters.mapAlias(mapper: ActorAliasMapper<TContextData>): ActorCallbackSetters<TContextData>
Sets the callback function that maps a WebFinger query to the corresponding
actor's identifier or username. If it's omitted, the WebFinger handler
only supports the actor URIs and acct:
URIs. If you want to support
other queries, you should set this dispatcher.
mapper: ActorAliasMapper<TContextData>
A callback that maps a WebFinger query to the corresponding actor's identifier or username.
ActorCallbackSetters<TContextData>
The setters object so that settings can be chained.