anchor.diff:  
   /*base class for component*/
   abstract class FlowComponent{
  -	
  +
  +  void activate();
  +  void hibernate();
  +  void shutdown();
  +
   }
   
   abstract class FlowSocket{
  
positive.code:   }
  }
  
  class FlowNetwork{
  
    static create() => new FlowNetwork();
  
  }
  
negative.code:   dynamic get meta;
  }
  
  
  class Socket extends FlowSocket{
    final BufferedStream stream = BufferedStream.create();
  