public static String valueOf(String namespace, String localPart){
        return StringUtil.isEmpty(namespace) ? localPart : '{'+namespace+'}'+localPart;
    }
public static String valueOf ( String namespace , String localPart ) { return StringUtil . isEmpty ( namespace ) ? localPart : '{' + namespace + '}' + localPart ; }
Returns string representation as <a href="http://jclark.com/xml/xmlns.htm">defined</a> by James Clark.
<p>
This is same as {@code String} returned by {@link javax.xml.namespace.QName#toString()}.

@param namespace namespace, can be null
@param localPart localpart

@return clarkName