How does Toggle Visible for a Column in a Table work ?

Hi All,
I have a question for you.
Using version 11.1.1.7:
I was playing with a use case where I need to show and hide columns in an af:table component.
I want to do this clientside using javascript.
Guess what: It works, however, it only works for hiding columns ?!
Initially I have client component = true and visible is true.
See javascript below.
When I call hideColumn, the component is found and hidden after calling.
When I call showColumns (after it is hidden) the component cannot be found anymore.
function showColumn(evt){
      var col = AdfPage.PAGE.findComponentByAbsoluteId("pt1:pc1:t1:c9") ;
      col.setVisible(true);
   function hideColumn(evt){
      var col = AdfPage.PAGE.findComponentByAbsoluteId("pt1:pc1:t1:c9") ;
      col.setVisible(false);
    }I checked and when the columns visible property is initially false, the column is not found by AdfPage.PAGE.findComponentByAbsoluteId("pt1:pc1:t1:c9"), which means it is not available ?!
It looks like the visible property for an af:column works slightly different then for other components such as buttons.
Also makes me wonder how the panelCollection component shows and hides columns. Doesn't that component do exactly the same ?
Thanks.

Luc,
couldn't find a hint in the sources (maybe didn't spend enough time). However, one reason for this behavior would be if the hidden column had no client component created (in which case it only exists as hidden HTML). The work around I think would be to use a serverListener on the table and to pass the columns to show/hide as the payload for server side show/hide
Frank

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