freemarker macro complex param issue

GIVEN:

<#macro lalala xxx yyy="BYBYBY" >
title=${title}, order = ${currentSort}


NEED:
<@lalala "ssssssssss" ((requestListSearchParam.order)!"") />
RESULT:
Expected method. "ssssssssss" evaluated instead to freemarker.template.SimpleScalar on <.....> The problematic instruction: - ==> macro lalala [on line <.........................>


FIX:
<#-- COMMA (,) ADDED -->

<@lalala "ssssssssss", ((requestListSearchParam.order)!"") />