Re: WAPresenter>>processCallbackStream: aCallbackStream

> Seaside evaluates all callbacks in the context of the component that
> rendered the callback. There might be callbacks that appear before the
> child-callbacks, as well as after the child callbacks (before and
> after refers to the location in the XHTML output).
>
> There might be also callbacks that appear in-between the
> child-callbacks. This case will be handled in the loop of
> WARenderContinuation>>processCallbacks:. This is all quite complicated
> and causes some troubles, especially in the context of AJAX.
>
> It might be dropped in upcoming versions of Seaside.