fileHandlerUUID, token.getMessageId ());
final DFSPayloads.FlushFile.Builder flushFileBuilder = DFSPayloads.FlushFile.newBuilder();
flushFileBuilder.setToken(token);
flushFileBuilder.setFileHandler(fileHandlerUUID);
final Message message = new Message(DFSHandlerMessage.FLUSH, flushFileBuilder.build());
return (this.sendRequest(message, token, Void.class));
}