docs: public static FragmentHandler printStringMessage(final int streamId) {
          return (buffer, offset, length, header) -> {
              final byte[] data = new byte[length];
              buffer.getBytes(offset, data);
  
              System.out.println(String.format("Message to stream %d from session %d (%d@%d) <<%s>>", streamId,
                              header.sessionId(), length, offset, new String(data)));
          };
      }