code: public <T extends BioPAXElement> T copy(Model model, T source, String newID)
  	{
  		T copy = copy(source, newID);
  		model.add(copy);
  		return copy;
      }
docs: Creates a copy of the BioPAX object with all its properties
  are the same, and also adds it to a model.
  
  @param <T> BioPAX type/class of the source and copy elements
  @param model target biopax model
  @param source a biopax object to copy
  @param newID new (copy) biopax object's URI
  @return copy of the source biopax element