package impl;

 import api.API;

 // BEGIN: theory.binary.constants.impl

 public class Impl extends API {

     protected void init(int version) throws IllegalStateException {

         if (version != API.VERSION) {

           throw new IllegalStateException("Wrong API version error!");

         }

     }

 // FINISH: theory.binary.constants.impl

     public static void main(String[] args) {

         System.err.println("main expects version: " + API.VERSION);

         new Impl();

         System.err.println("done for version: " + API.VERSION);

     }

 }