code: private String getQueryParam() {
  
          final String param = parseOptionalStringValue(XML_ELEMENT_QUERYPARAM);
          if (param == null) {
              return DEFAULT_QUERY_PARAM;
          } else {
              return param;
          }
      }
docs: Returns the configured request parameter for the current query string, or the default parameter if the core is not specified.
  @return The configured request parameter for the current query string, or the default parameter if the core is not specified.