code: public void declareRequestedFieldname(String name) {
          if (name.endsWith(".*")) {
              stringSetValues.put(name, new HashMap<>());
              stringSetPrefixes.put(name.substring(0, name.length() - 1), name);
          }
      }
docs: For multivalue things we need to know what the name is we are expecting.
  For those patterns we match the values we get against
  
  @param name the name of the requested multivalue