<se:pagetranslations id="session">
      <se:collection>
            <se:member name="get(key, default)">
                  <se:if expression="!request.ispreview()">
                        <se:then>
                              {translation.setresult(session.get(translation.arg(key)))}
                        </se:then>  
                        <se:else>
                              {translation.setresult(translation.arg(default))}
                        </se:else>
                  </se:if>
            </se:member>
            <se:member name="set(key, value)">
                  <se:if expression="!request.ispreview()">
                        <se:then>
                              {session.set(translation.arg(key),translation.arg(value))}
                        </se:then>  
                  </se:if>
            </se:member>
      </se:collection>
</se:pagetranslations>