@Override
 public boolean equals(final Object o) {
   if (o instanceof GroupTaskAccessDO) {
     final GroupTaskAccessDO other = (GroupTaskAccessDO) o;
     if (ObjectUtils.equals(this.getGroupId(), other.getGroupId()) == false) return false;
     if (ObjectUtils.equals(this.getTaskId(), other.getTaskId()) == false) return false;
     return true;
   }
   return false;
 }