code: private Set<Conversion> getRelatedConversions(Collection<Interaction> inters)
  	{
  		Set<Conversion> set = new HashSet<Conversion>();
  
  		for (Interaction inter : inters)
  		{
  			if (inter instanceof Conversion)
  			{
  				set.add((Conversion) inter);
  			}
  			else if (inter instanceof Control)
  			{
  				getRelatedConversions((Control) inter, set);
  			}
  		}
  		return set;
  	}
docs: Get all related Conversions of the given Interaction set.
  @param inters Interactions to query
  @return Related Conversions