code: public AnimaQuery<T> order(String columnName, OrderBy orderBy) {
          if (this.orderBySQL.length() > 0) {
              this.orderBySQL.append(',');
          }
          this.orderBySQL.append(' ').append(columnName).append(' ').append(orderBy.toString());
          return this;
      }
docs: generate order by statement
  
  @param columnName column name
  @param orderBy    order by @see OrderBy
  @return AnimaQuery