code: public <T> boolean unsubscribe(Subscriber<T> s, Class<T> messageType) {
  		return subscribeStrategy.unsubscribe(mapping, s, messageType);
  	}
docs: Forces the given subscriber to unsubscribe from the given type of
  messages.
  
  @param <T>
  - The type to unsubscribe from.
  @param s
  - The subscriber that will be forced to unsubscribe.
  @param messageType
  - The type of message.
  @return Returns true if the subscriber was forced to unsubscribe from the
  given type pf messages.