code: private Set<Conversion> getRelatedConversions(Control ctrl, Set<Conversion> set)
  	{
  		for (Process process : ctrl.getControlled())
  		{
  			if (process instanceof Conversion)
  			{
  				set.add((Conversion) process);
  			}
  			else if (process instanceof Control)
  			{
  				getRelatedConversions((Control) process, set);
  			}
  		}
  		return set;
  	}
docs: Recursively searches the related Conversions of a Control.
  @param ctrl Control to query
  @param set Set to collect the related Conversions
  @return The same set