transform
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../join/" class="md-nav__link">
        DataStream.join
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      <a href="../groupby/" class="md-nav__link">
        DataStream.groupby
      </a>
    </li>
  

            
          
            
              
  
  
  
    <li class="md-nav__item">
      