@Override
 public int hashCode() {
   final int prime = 31;
   int result = 1;
   result = prime * result + ((cubeSeg == null) ? 0 : cubeSeg.hashCode());
   result = prime * result + ((cuboid == null) ? 0 : cuboid.hashCode());
   result = prime * result + ((fuzzyKeyString == null) ? 0 : fuzzyKeyString.hashCode());
   result = prime * result + ((startKeyString == null) ? 0 : startKeyString.hashCode());
   result = prime * result + ((stopKeyString == null) ? 0 : stopKeyString.hashCode());
   return result;
 }