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Unable to find setter method for attribute: newspaperColumns

brummeline kebratn
Posts: 5
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I'm trying to get a list of categories wrapped over multiple columns whith the <t:datatable newspapercolumns> attribute.

My code is like this:

I know that my bean works properly because I'm able to output the list in one column.
When I try to open this page in my browser, I get the following error:

How do I solve this problem? I've googled for an answer, but all I find is that I have to rewrite the setter method, but I dont know where to find the setter method in the first place.

Please help me!
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