add: return; 
context: function username_macro(param) {   if (!session.user)      return;   if (session.user.url)      Html.link(session.user.url, session.user.name);   else      res.write(session.user.name);}
meta: 993	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/993/a036ee7912ed2e0e3e64b12c3d9156ca948342ca/macros.js/clean/code/Global/macros.js