code: public Address add(String type, String name) {
          addressNode.add(type, name);
          return this;
      }
docs: Adds a single level to this address. For example, if this address is currently "/a=b"
  and this method is called with type=x and name=y this address will now be "/a=b/x=y".
  
  @param type the new address part's type
  @param name the new address part's name
  
  @return this address with the new address part added to it