protected Map queryProperties(Map model) {
        return model;
    }
Determine name-value pairs for query strings, which will be stringified,
URL-encoded and formatted by appendQueryProperties.
<p/>
This implementation returns all model elements as-is.

@param model the model elements for which to determine name-value pairs.
@return the name-value pairs for query strings.
@see #appendQueryProperties
web/src/main/java/org/apache/shiro/web/util/RedirectView.java