@Override
 public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + ((value == null) ? 0 : value.hashCode());
   return result;
 }
 @Override
 public boolean equals(Object obj) {
   if (this == obj) return true;
   if (obj == null) return false;
   if (!(obj instanceof IHighResRelativeTime)) return false;
   IHighResRelativeTime other = (IHighResRelativeTime) obj;
   if (value == null) {
     if (other.value != null) return false;
   } else if (!value.equals(other.value)) return false;
   return true;
 }