docs: private VoltXMLElement forgeVoltXMLForSwapTables(
              String theTable, String otherTable) {
          if (theTable.equalsIgnoreCase(otherTable)) {
              throw new PlanningErrorException("Can not swap table \"" + theTable + "\" with itself.");
          }
          VoltXMLElement result = new VoltXMLElement("swap");
          result.attributes.put("thetable", theTable.toUpperCase());
          result.attributes.put("othertable", otherTable.toUpperCase());
          return result;
      }