public static String resolve(
            final Map<String, Map<String, String>> data, final String group,
            final String key
    )
    {
        return resolve(data, group, key, null);
    }
public static String resolve ( final Map < String , Map < String , String > > data , final String group , final String key ) { return resolve ( data , group , key , null ) ; }
Return the resolved value from the context
@param data data context
@param group group name
@param key key name
@return resolved value or null