How can we pass OGNL list to macro

I am developing website using struts2 and freemarker .
I want to pass list created using ognl({'item1','item2','item3',...}) to
macro.
I tried following
<#macro traverseList mylist>
//
</#macro>
<traverseList mylist="%{'item1','item2',...}" ></traverseList>
but getting error as 'unexpected collection or sequence..//..'
Following works
<traverseList mylist=['item1','item2',...] ></traverseList>
But i want it through ognl because i want to pass expression like
collectionName{expression} e.g. users.{?#this.age>20}


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