// BEGIN: cycles.encryptor1

 package org.apidesign.cycles.crypt;

 import org.apidesign.cycles.array.MutableArray;

 public final class Encryptor {

     public void encode(byte[] arr) {

         MutableArray m = new MutableArray(arr);

         m.xor((byte)0x3d);

     }

 }

 // END: cycles.encryptor1