code: private boolean search(LinkedList<Control> list, Interaction inter)
  	{
  		if (list.getLast().getControlled().contains(inter)) return true;
  
  		for (Process process : list.getLast().getControlled())
  		{
  			if (process instanceof Control)
  			{
  				// prevent searching in cycles
  				if (list.contains(process)) continue;
  
  				list.add((Control) process);
  				if (search(list, inter)) return true;
  				else list.removeLast();
  			}
  		}
  		return false;
  	}
docs: Checks if the control chain is actually controlling the Interaction.
  @param list the Control chain
  @param inter target Interaction
  @return true if the chain controls the Interaction