code: @Override
  	public Collection<BioPAXElement> generate(Match match, int... ind)
  	{
  		Collection<BioPAXElement> gen = new HashSet<BioPAXElement>();
  
  		for (MappedConst mc : con)
  		{
  			gen.addAll(mc.generate(match, ind));
  		}
  		return gen;
  	}
docs: Gets the intersection of the generated values of wrapped constraints.
  @param match current pattern match
  @param ind mapped indices
  @return intersection of the generated values of wrapped constraints