@Override
 public int hashCode() {
   int result = bitSet.hashCode();
   result = 31 * result + (scalarFields != null ? scalarFields.hashCode() : 0);
   result = 31 * result + (floatFields != null ? floatFields.hashCode() : 0);
   result = 31 * result + (doubleFields != null ? doubleFields.hashCode() : 0);
   return result;
 }