Unregisters a previously registered event filter from this node. One filter might have been registered for different event types, so the caller needs to specify the particular event type from which to unregister the filter.

Parameters:

<T>		the specific event class of the filter
eventType		the event type from which to unregister
eventFilter		the filter to unregister

Exceptions:

NullPointerException

if the event type or filter is null