What will be syntax of this function for version 5?
<CMS_FUNCTION name="legacyIf" resultname="global_trim_level">
<CMS_VALUE_PARAM name="conditionVar" value="Global.preview"/>
<CMS_PARAM name="compareValue" value="1"/>
<CMS_CDATA_PARAM name="trueValue">4</CMS_CDATA_PARAM>
<CMS_CDATA_PARAM name="falseValue">4</CMS_CDATA_PARAM>
</CMS_FUNCTION>