code: protected List<PExp> cloneListPExp(List<PExp> args)
  	{
  		List<PExp> clones = new LinkedList<PExp>();
  		for (PExp pexp : args)
  		{
  			clones.add(pexp.clone());
  		}
  		return clones;
  	}
docs: Clone a list of PExps (and return a typed list)
  
  @param args the
  list to clone
  @return a Typed list of PExps