docs: public static String notAllNullParameterCheck(String parameterName, Set<EntityColumn> columnSet) {
          StringBuilder sql = new StringBuilder();
          sql.append("<bind name=\"notAllNullParameterCheck\" value=\"@tk.mybatis.mapper.util.OGNL@notAllNullParameterCheck(");
          sql.append(parameterName).append(", '");
          StringBuilder fields = new StringBuilder();
          for (EntityColumn column : columnSet) {
              if (fields.length() > 0) {
                  fields.append(",");
              }
              fields.append(column.getProperty());
          }
          sql.append(fields);
          sql.append("')\"/>");
          return sql.toString();
      }