code: public void handleEventsCollection(final S symbol, final Collection<T> elements) {
  		
  		final List<BiConsumer<S, T>> callbackList = callbacks.get(symbol);
  		
  		if(callbackList == null) {
  			return;
  		}
  				
  		if(callbackList.isEmpty()) {
  			return;
  		}
  		
  		// Notify callbacks synchronously, to preserve the order of events
  		for (final T element : elements) {
  			callbackList.forEach((c) -> {
  				c.accept(symbol, element);
  			});
  		}
docs: Process a list with event
  @param symbol
  @param ticksArray