protected String loadCacheBust(Scriptable cfg) {
		String result = null;
		Object value = cfg.get(CACHEBUST_CONFIGPARAM, cfg);
		if (value != Scriptable.NOT_FOUND && value != Undefined.instance) {
			result = toString(value);
		}
		return result;

	}
protected String loadCacheBust ( Scriptable cfg ) { String result = null ; Object value = cfg . get ( CACHEBUST_CONFIGPARAM , cfg ) ; if ( value != Scriptable . NOT_FOUND && value != Undefined . instance ) { result = toString ( value ) ; } return result ; }
Initializes and returns the string specified by the {@code cacheBust}
property in the server-side config JavaScript.

@param cfg
The parsed config JavaScript as a properties map
@return the {@code cacheBust} property value