text: #ifndef __BLOCK_AGENT__H
  #define __BLOCK_AGENT__H 
  
  #include "enviro.h"
  
  using namespace enviro;
  
  class BlockController : public Process, public AgentInterface {
  
      public:
      BlockController() : Process(), AgentInterface() {}
  
      void init() {}
      void start() {}
      void update() {
      }
      void stop() {}
  
  };
  
  class Block : public Agent {
      public:
      Block(json spec, World& world) : Agent(spec, world) {
          add_process(c);
      }
      private:
      BlockController c;
  };
  
  DECLARE_INTERFACE(Block)
  
  #endif