[Seaside] How to stop periodical?

[Boris Popov]

Here's an adaptation of a standard periodical test, except I'd like it
to stop polling at some point (in this example, immediately),

renderContentOn: html
 (html paragraph)
  script:
   ((html periodical)
       assignTo: 'my_periodical';
       frequency: 5 seconds;
       on: #renderTimeOn: of: self);
   with: 'getting current time...'

renderTimeOn: html
 html render: Time now.
 html script:
  ((html javascript)
     add: (SUStream on: 'my_periodical.stop()');
     yourself)

Seems to run okay, but doesn't stop and I can't seem to find any decent
documentation for scriptaculous JS API,

Any hints?

Thanks!

-Boris

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