Enable Logging External Events
The only events loggable are those visible on a Service's interface, it goes through the proxies and is hooked.
Now, events internal to a plugin can't be logged. Let's say that we have an EyeTracking plugin, we may want to have logs on calibration, to know if it is efficient, or whatever.
This is the kind of event that will not be exposed in the interface. But we sure will want to log it.
The task is to enable logging this event. Through the ServiceHost.