code: @Override
      public String getParameter(String name) {
          String value = wrapped.getParameter(name);
          if (value == null) {
              final String[] multipleValue = parameters.get(name);
              if ((multipleValue != null) && (multipleValue.length > 0)) {
                  value = multipleValue[0];
              }
          }
          return value;
      }
docs: ==============