public String expandBody(MssCFGenContext genContext) {
    final String S_ProcName = "CFDbTestMssCFBindOptMinValueTestDate.expandBody() ";

    if (genContext == null) {
      throw CFLib.getDefaultExceptionFactory()
          .newNullArgumentException(getClass(), "expandBody", 1, "genContext");
    }

    ICFLibAnyObj genDef = genContext.getGenDef();
    if (genDef == null) {
      throw CFLib.getDefaultExceptionFactory()
          .newNullArgumentException(getClass(), "expandBody", 1, "genContext.getGenDef()");
    }

    String ret;

    if (genDef instanceof ICFDbTestOptMinValueObj) {
      Calendar testDate = ((ICFDbTestOptMinValueObj) genDef).getOptionalTestDate();
      if (testDate == null) {
        ret = null;
      } else {
        ret = CFLibXmlUtil.formatDate(testDate);
      }
    } else {
      throw CFLib.getDefaultExceptionFactory()
          .newUnsupportedClassException(
              getClass(),
              "expandBody",
              "genContext.getGenDef()",
              genDef,
              "ICFDbTestOptMinValueObj");
    }

    return (ret);
  }