code: public <S extends Subscriber<T>, T> boolean unsubscribeByTypes(
  			S subscriberType, Class<T> messageType) {
  		return subscribeStrategy.unsubscribeByTypes(mapping, subscriberType,
  				messageType);
  	}
docs: Forces subscribers to unsubscribe based on the given subscriber type and
  message type.
  
  @param <S>
  - The type of subscriber to unsubscribe from.
  @param <T>
  - The type of the subscriber.
  @param subscriberType
  - The type of subscriber that will be forced to unsubscribe.
  @param messageType
  - The type of message that the subscibers will unsubscribe
  from.
  @return Returns true if at least one subscriber was forced to
  unsubscribe. Otherwise, it returns false.