How to call a method without printing its return value?

[bluejoe]

Hi, all.
 
 How to call a method without printing its return value? For example, I define 
a class MyList, which has a method:
 
  public MyList add(String e);
 
 In my template, when I write:
 
  $list.add("a").add("b")...
 
 When rendered, the method will be called, but the value returned will be also 
printed unexpectedly. To hide the output, now I have to write codes as below:
 
  #set($___TEMP___ = $list.add("a").add("b"))
 
 It solves my problem, but I want to know if there is any better way?

-bluejoe