code: public LexicalAnalyzer getAnalyzer()
      {
          for (Pipe<List<IWord>, List<IWord>> pipe : this)
          {
              if (pipe instanceof LexicalAnalyzerPipe)
              {
                  return ((LexicalAnalyzerPipe) pipe).analyzer;
              }
          }
          return null;
      }
docs: 获取代理的词法分析器
  
  @return