code: public void add(Object name, Object value) 
      {
          Object lo = super.get(name);
          Object ln = LazyList.add(lo,value);
          if (lo!=ln)
              super.put(name,ln);
      }
docs: Add value to multi valued entry.
  If the entry is single valued, it is converted to the first
  value of a multi valued entry.
  @param name The entry key.
  @param value The entry value.