code: public static MessageFetcher fetcher(final String pathServiceSid, 
                                           final String pathChannelSid, 
                                           final String pathSid) {
          return new MessageFetcher(pathServiceSid, pathChannelSid, pathSid);
      }
docs: Create a MessageFetcher to execute fetch.
  
  @param pathServiceSid The service_sid
  @param pathChannelSid The channel_sid
  @param pathSid The sid
  @return MessageFetcher capable of executing the fetch