code: public void addMessage(String key, String value) {
  
          if (m_bundleMap != null) {
              m_bundleMap.put(key, value);
          }
      }
docs: Adds a message to this list bundle.<p>
  
  Please note:
  All additions after the initial call to {@link #getContents()} are ignored.<p>
  
  @param key the message key
  @param value the message itself