code: @Setup
    public void setUp() throws Exception {
      customOptions = new ArrayList<>(customOptionsCount);
      for (int i = 0; i < customOptionsCount; i++) {
        customOptions.add(CallOptions.Key.createWithDefault("name " + i, "defaultvalue"));
      }
  
      allOpts = CallOptions.DEFAULT;
      for (int i = 0; i < customOptionsCount; i++) {
        allOpts = allOpts.withOption(customOptions.get(i), "value");
      }
  
      shuffledCustomOptions = new ArrayList<>(customOptions);
      // Make the shuffling deterministic
      Collections.shuffle(shuffledCustomOptions, new Random(1));
    }
docs: Setup.