Date d = null; String since = this.getModifyTime(); if (since != null) { d = new Date(Long.parseLong(since)); } return d;
return this.string2date(this.getModifyTime());
  public Date modifyTime() {    // TODO Refactor out commonality with `createTime'    Date d = null;    String since = this.getModifyTime();    if (since != null) {      d = new Date(Long.parseLong(since));    }    return d;  }