code: public void registerClass(String name, byte[] bytes) {
  	    
  		if (registeredClasses.containsKey(name)) {
  			throw new IllegalStateException("Attempted to register a class that has been registered already: " + name);
  		}
  		registeredClasses.put(name, bytes);
  	}
docs: Registers a class by its name
  @param name The name of the class to be registered
  @param bytes An array of bytes containing the class