code: public void addInterceptor(Interceptor interceptor, String... paths) {
  		Preconditions.notNull(interceptor, "no interceptor provided");
  		interceptors.add(new InterceptorEntry(interceptor, paths));
  	}
docs: Adds the <code>interceptor</code> to the list of interceptors that will matches the specified
  <code>paths</code>.
  
  @param interceptor the interceptor object to be added.
  @param paths the paths in which this interceptor will be invoked, an empty array to respond to all paths.